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PLOS One logoLink to PLOS One
. 2025 Mar 25;20(3):e0318872. doi: 10.1371/journal.pone.0318872

Effect of emotional regulation on performance of shooters during competition: An ecological momentary assessment study

Zhou Lulu 1,2,#, Liu Huimin 2, Su Hua 1,*,#
Editor: Michael B Steinborn3
PMCID: PMC11936280  PMID: 40131872

Abstract

Objective

The purpose of this study was to examine the effect of emotion regulation on shooting performance in shooting athletes.

Method

Ecological momentary assessment was used to track and examine the dynamic relationship between pre-competition and in-competition emotions, emotion regulation strategy selection and use, and shooting performance in 57 shooting athletes.

Results

Female athletes used more regulation strategies than male athletes and had lower mean shooting scores when using disengagement strategies and lower good ten-ring percentages when using engagement strategies compared to male athletes. Elite athletes had a higher percentage of ten-ring scores when using engagement strategies than did first-level athletes, but a lower percentage of ten-ring scores when using disengagement strategies. The use of emotion regulation strategies and situational demands were not strongly related. Athletes had low flexibility in emotion regulation and were better at using disengagement strategies, but disengagement strategies were not beneficial for shooting performance.

Conclusions

First-level athletes have a higher contextual demand for emotion regulation and tend to use disengagement strategies more frequently to regulate emotions. Elite-level athletes have higher average ring values and ten-ring ratios when using engagement strategies under lower contextual demand and using disengagement strategies under higher contextual demand. Enhancing flexible emotional regulation training that improves situation-strategy fit may be beneficial for enhancing sports performance.

1. Introduction

Shooting is a precise and static sport. It requires a high level of psychological stability. The performance of specialized skills such as stability and coordination in shooting sports depends to a certain extent on the conscious state of the shooter during the execution of the action [1]. Especially in shooting sports that require extremely high accuracy, the difference in skill level between shooters is minimal, resulting in great suspense and intense emotional changes caused by changes in performance [2,3]. Negative emotions also have a direct impact on shooting performance [3]. High-intensity emotional experiences can affect cognition, self-control, perception, action, coordination, and strategy, resulting in errors [3,4]. For example, a significant increase in anxiety level before a competition, continuous fluctuations during the competition, and severe impact on the performance of sports skills, even leading to action errors. Physical anxiety has a very strong effect on shooting performance [4]. Elite shooters believe that the level of anxiety will increase significantly before the competition and will continue to fluctuate during the competition, which is an important psychological factor affecting the Olympic shooting competition [5]. Athletes are under great psychological pressure, which causes athletes’ psychological anxiety and stress, which has a negative impact on athletes’ performance [6]. Therefore, the ability to regulate emotions at a higher level is a prerequisite for stable shot release and an important factor in the shooter’s ultimate ability to compete [7,8].

1.1. The effect of emotion regulation strategies on sport performance

Emotion regulation is often considered to be an important component of an athlete’s psychological abilities. The primary focus is on how individuals use regulation strategies and the effectiveness of these strategies to reflect the impact of emotion regulation on an individual’s psychological activity and behavior. Cognitive emotion regulation strategies related to competition (such as planning for reflection, positive reappraisal, and acceptance) reflect the emotion regulation ability of active shooting athletes and promote shooting performance [9]. Emotion regulation plays a primary role in different time periods during the process of emotion generation, where individuals use regulation strategies to regulate their emotional state and intensity at different times [10]. Cognitive reappraisal (changing one’s understanding of events and situations) and expressive suppression (attempting to suppress emotions) represent two specific types of regulation strategies. They are the most commonly used emotion regulation strategies in laboratory studies. Cognitive reappraisal has also been found to be a broadly applicable regulation strategy for all types of emotional situations [10]. In the field of sport, cognitive reappraisal has a better effect on regulating pre- and post-competition emotions, mainly by reducing the interference caused by pre-competition excitement and anxiety, and positively predicting competition performance. It also has a positive effect on post-traumatic stress and competition anxiety [11,12]. However, the regulatory effect of reappraisal during the competition process is inconsistent. It can effectively improve golfers’ shooting rate and accuracy [13]. Meanwhile, some studies have found that reappraisal of physiological arousal can promote adaptive stress responses (cardiovascular responses) and increase a higher sense of resources and confidence [14]. During athletic movement performance, expressive suppression is more effective than cognitive reappraisal and distraction in promoting reaction time improvement and reducing movement errors within the transient activated period of emotion regulation (5-8s) [15]. Compared to emotional suppression, emotional physiological response suppression (biofeedback) can more effectively improve athletic performance [16]. Expressive suppression is the most commonly used strategy by athletes in intense competition with limited time [15], but the effective time is short, and the negative experience caused by high intensity may disrupt the movement structure. When experiencing low-intensity negative emotions, expressive suppression may slow down the grip force in shooting, risking missed opportunities to fire, yet it paradoxically boosts shooting accuracy [17]. It can be seen that the effect of specific emotion regulation strategies is not stable. Athletes in competitive sports do not merely employ a specific strategy; instead, they select different emotion regulation strategies based on the changing context [9,15,16]. The prerequisite for effective emotion regulation strategies is the context that triggers emotional changes. Previous studies have focused on exploring regulation strategies or patterns that are applicable to sport situations, and compared to life situations, sport situations are constantly changing, and the applicability of specific regulation strategies is challenged.

1.2. Classification of emotion regulation strategies

Previous research has classified emotion regulation strategies into adaptive strategies (problem solving, reappraisal, mindfulness) and maladaptive strategies (expressive suppression, avoidance, rumination) based on their adaptability to emotions triggered by life situations [18]. This classification is more in line with the scope of research in health psychology, while the sport field focuses on investigating emotion regulation strategies that improve sport performance. The ability model suggests that emotional clarity, emotional tolerance, and emotion regulation flexibility are the potential for individuals to regulate emotions [10,18]. They are all important factors of emotional regulation ability, especially emotion regulation flexibility, which reflects the individual’s ability to flexibly choose strategies in changing situations. Regulation strategies are divided into engagement and disengagement strategies based on the degree of successful emotion regulation and tolerance of aversive emotions [19]. Characteristics of engagement strategy is active participation in the pain or confronting the root cause of the emotion, including cognitive reappraisal, acceptance, and problem solving. Characteristics of the disengagement strategy include strong avoidance of painful emotions, thoughts, or situations, including expressive suppression and avoidance. Rumination is a form of cognitive processing where an individual repeatedly dwells on negative aspects of their experiences, thoughts, feelings, or problems without taking active steps to resolve them. This process is characterized by a passive disengagement from the situation, often accompanied by a tendency to avoid confronting or dealing with the difficulties head-on. Rumination (disengagement with a tendency to avoid difficulties) is also classified as a disengagement strategy [20]. Strategies were drawn from meta-analytical work that identified six distinct, commonly used strategies: three engagement strategies (cognitive reappraisal, acceptance, problem solving) and three disengagement strategies (rumination, expressive suppression, avoidance) [19,22]. Regulation strategies that successfully regulate emotions or tolerate aversive emotions are better suited for athletes to achieve their goal of enhancing sport performance than regulation strategies that are more adaptable to individual psychological health development [15,18,19].

1.3. Flexible use of emotion regulation strategies

Emotion regulation plays an important role in the performance of athletic skills. Research in sport psychology has attempted to identify patterns similar to those in the mental health field, namely, which regulation patterns and strategies can help athletes effectively regulate negative emotions in the competitive arena and maintain normal performance levels. However, in rapidly changing competitive sports situations (e.g., Changes in performance, such as leading or lagging behind, can trigger intense emotional experiences for athletes.), the effects of specific emotion regulation strategies are not stable, and athletes need to flexibly choose and use different strategies based on changes in the situation to achieve good results. Psychological research on emotion regulation has gradually shifted from investigating the adaptability of specific emotion regulation strategies to investigating the flexibility of regulation strategies that balance context and strategy [21]. The ability to dynamically adjust regulation strategies based on changing environmental demands is referred to as emotion regulation flexibility [22]. Therefore, assessing environmental demands is a prerequisite for choosing or switching regulation strategies. An individual’s environmental demands are influenced by emotional intensity and perceived controllability [20]. Strategies that require more participation and effort, such as cognitive reappraisal, may be most effective in regulating low-intensity emotions, whereas strategies that involve disengagement from stimuli, such as distraction, may be most effective in regulating high-intensity emotions [23,24]. In terms of perceived controllability, higher perceived controllability of one’s emotional experiences should be helpful in actively regulating attempts to change one’s emotional experiences [20]. When the sense of control is weakened or uncontrollable, individuals may reduce their efforts to regulate their emotions or even attempt to escape or avoid them [25].

In the field of competitive sports, important factors affecting athletic performance are often explored by comparing differences between elite and non-elite athletes. Elite shooters show relative stability in their performance across different levels of competition. They also have higher skills in emotion regulation and self-control [1]. In addition, there are significant differences in sensitivity to environmental demands and the use of regulation strategies between individuals of different genders, with females using more strategies and being more flexible in switching between strategies than males [11].

The ability model of emotion regulation posits that emotional tolerance and regulatory flexibility are two critical dimensions of emotion regulation [10,18]. The degree of emotional involvement in regulatory strategies reflects emotional tolerance [19]. Accordingly, regulatory strategies are categorized into two types. Engagement strategies are characterized by active engagement with distress or its source and encompass cognitive reappraisal, acceptance, and problem-solving. Disengagement strategies are marked by efforts to evade distressing emotions, thoughts, or situations and include expressive suppression and avoidance. The most prominent characteristic of the flexible emotional regulation process lies in the matching of emotional regulation strategies to contextual demands, namely, matching regulatory strategies to contextual demands [22]. The contextual demands of emotional regulation incorporate emotional intensity and perceived controllability. Researchers have conducted more studies on the matched emotional regulation strategies under different levels of emotional intensity [23,24], arriving at a relatively consistent conclusion: when individuals regulate low emotional intensity, engagement strategies are more effective (e.g., cognitive reappraisal), while when individuals experience high emotional intensity, disengagement strategies are more effective (e.g., distraction). Research on perceived controllability is underdeveloped compared to that on emotional intensity. Nevertheless, a high level of perceived controllability may render individuals more inclined to attempt to modify their emotional experience. In contrast, a diminished sense of control perpetuates efforts to avoid the emotional experience [25]. That is, if people believe they can alter an aversive experience, they will endeavor to do so; if they cannot change it, they will strive to escape or avoid it [26].

1.4. How to study flexible emotional regulation process

Emotion regulation possesses distinct characteristics. Unlike the previous studies on the relationship between emotion regulation tendencies (strategy usage preferences) and environmental adaptation [15,18,19], this research focuses on examining whether emotional regulation flexibility has a facilitating effect on sports performance. Conventional emotion regulation measurement tools can merely measure an individual’s preference for emotion regulation strategies but fail to reflect the individual’s potential to employ multiple diverse emotion regulation strategies based on situational variations [21,22]. Emotion regulation tendencies and emotional regulation flexibility are two distinct characteristics of emotion regulation, and they differ significantly in terms of constructs. The original measurement tools tend to measure an individual’s preference for using strategies in certain relatively stable situations. Although the core features of strategies are stable (for instance, the reappraisal strategy involves changing thoughts), the regulation context varies greatly and is dynamic. Therefore, the examination of an individual’s strategy usage in the context of situational changes constitutes an investigation of short-term psychological changes. When evaluating short-term psychological changes such as relaxation, the corresponding measurement tools should give priority to considering the variability of the situation and content [27,28]. According to previous studies, the tools and items for measuring short-term psychological changes should be sensitive (capture state changes), contextual (consider the measurement background or situational variability), and individualized (measurement items adapted to different individuals).

Recent longitudinal tracking of individuals’ dynamic changes in emotion regulation has gradually become an important trend in emotion regulation research [11,20–22]. This study focuses on examining the characteristic of emotional regulation flexibility. The core of emotional regulation flexibility lies in the flexible selection and use of regulatory strategies in response to situational changes, whereas traditional emotion regulation measurement tools primarily assess habitual use of emotion regulation strategies without examining situational changes. The essence of the concept of emotional regulation flexibility is to alter emotion regulation strategies flexibly according to the demands of emotion regulation (situational changes). The rules for using emotion regulation strategies themselves do not change with the context, such as cognitive reappraisal, which requires individuals to change their thoughts, altering their cognitive interpretation of different eliciting situations [29]. Based on this, the examination of emotional regulation flexibility in this study is grounded in the variability of situational changes and the selection of regulatory strategy use rules that have been widely validated in previous research, to explore the dynamic changes in athletes’ emotion regulation processes.

1.5. Research purpose and hypothesis

The purpose of this study was to examine the influence of athletes’ emotion regulation during competition on their performance using a longitudinal tracking method. This method provides a more accurate reflection of the psychological changes that occur during competition than laboratory studies or retrospective surveys. To achieve this goal, our study had two specific aims. Aim 1 was to elucidate the disparities in situational demands and the deployment of regulatory strategies among athletes varying in proficiency levels. It is hypothesized that elite athletes will exhibit lower levels of regulatory contextual demand, specifically in terms of emotion intensity and perceived controllability, when contrasted with their non-elite counterparts. Additionally, it is anticipated that elite athletes will demonstrate a distinct preference in the selection of emotion regulation strategies. The study further posited a positive correlation between the contextual demand and the typology of regulatory strategies, indicative of a dynamic emotional regulation process. This relationship suggested that high contextual demand would be associated with a predisposition towards disengagement strategies, whereas lower contextual demand would be linked to an inclination towards engagement strategies. Aim 2 was to examine the combined influence of contextual demand and regulatory strategy types on athletic performance, with a particular focus on their interplay in affecting shooting performance. It is hypothesized that differing skill levels may serve as a moderator of contextual demand and strategy types predicting shooting performance. Within the elite athlete cohort, it is expected that a congruence between context demands and strategy types will significantly predict athletic performance. In contrast, this predictive relationship may be less pronounced among non-elite athletes. Given the potential influence of gender on the utilization of emotional regulation strategies, this variable will be controlled for within the study to ensure the accuracy and reliability of the findings.

2. Materials and methods

2.1. Participants and procedure

Participants were 60 Chinese active shooters who competed during the selection period for the 2022 World Championships in Cairo. Our final sample included 23 national and higher level shooters (8 females) and 34 first level shooters (13 females). Simulation studies of multilevel power suggest that designs with 50 Level 2 units (e.g., participants) with 14 Level 1 units (e.g., times) provide sufficient power (i.e., greater than.80) available to detect effect sizes ≥ .20 [30,31]. The average participants age was 23.27 (SD =  2.88) years.

Prior to data collection, we obtained verbal consent from the sports teams and coaches and written consent from each athlete participant. Prior to the initial data collection, it was explained to the athlete participants that the purpose of our study was to examine emotional regulation and athletic performance in athletes. Using ecological momentary assessment, we followed 57 athletes during competitions for a period of 6 days before the competition and 2 days during the competition (March 12, 2022 to March 20, 2022), recording emotional events, emotional intensity, perceived control, emotion regulation strategies, and shooting performance at 14 different time points, including each morning and afternoon before the competition and at the end of each competition day. Participants with more than 40% missing assessments are to be excluded [32]. Among the 60 participants, 3 athletes submitted assessments with more than 40% missing values, thus these 3 athletes were excluded from the statistical data.

All participants first learned the basic meanings of emotion regulation strategies and were able to provide appropriate examples based on their own experiences in sport to ensure that athletes fully understood the meaning of each strategy. For the experience sampling portion, participants were given a survey containing questions about the previous day once at 9:00 am and 3:00 pm for 8 consecutive days. Athletes are required to complete the assessment within 15 minutes after each daily training session and 30 minutes after each competition. Completion time will be monitored by both the questionnaire system and the investigators. (As part of a larger study, participants also completed Ecological Momentary Assessment (EMA) surveys sent twice daily.

Ethics statement Prior to the initiation of this research, ethical review approval has been granted by the Sports Psychology Professional Committee of Beijing Sport University. All research participants have signed written informed consent forms. For those unable to sign written consent, we provided detailed verbal explanations to ensure their full comprehension of the study content, risks, and benefits, and obtained their verbal agreement to participate in the presence of a third-party witness. We strictly adhere to ethical guidelines to safeguard the rights and interests of all participants.

2.2. Measures

Contextual demands.

The assessment of emotional events and situational demands includes four items. One item examines the events that trigger the athlete’s emotions(“What was the event that triggered your negative emotional feelings in training today?”), another item assesses the intensity of the athlete’s emotions(“Assess the intensity of this negative emotional feeling”), and two items assess controllability: emotional controllability (“To what extent do you feel you were in control of your emotional response?”) and situational controllability (“To what extent were you in control of what happened to you?”). Items are scored on a 5-point scale ranging from 1=”not at all” to 5 = ”very much”.

Regulatory strategies.

According to the ability model of emotion regulation, the core characteristics of the six regulatory strategies are relatively stable. In this study, the items for the six emotion regulation strategies were derived from existing measurement tools, extracting the key characteristics of each strategy. Acceptance involves merely noticing without judgment [30]. Problem-solving refers to identifying specific and concrete methods to deal with current emotions [33]. Cognitive reappraisal involves individuals changing their thoughts about a situation to alter their emotions. Expressive suppression entails inhibiting the emotions felt and refraining from expressing them to achieve emotional regulation [34]. Rumination is characterized by repetitive or immersive experiences or thoughts about certain emotions [35]. Avoidance encompasses a variety of strategies to escape, control, or suppress unwanted thoughts, emotions, and sensations [36]. To assess the emotional regulation process of athletes within a relatively short timeframe, brief measurements are necessary to avoid excessively prolonging the testing period. Although the effectiveness of emotion regulation strategies may be influenced by context, the rules governing the use of these strategies do not change with context.

Participants were asked, “How do you cope with the events that trigger the emotional experiences mentioned above? Which of the following strategies did you choose to cope with them?”

Cognitive reappraisal was measured with an item “I tried to think about the situation differently.” Acceptance was measured with “I tried to notice my thoughts and feelings without thinking of them as good or bad.” Problem-solving was measured with “I tried to come up with a specific strategy to work through my anxiety.” Expressive suppression was measured with “I made sure not to express what I was feeling.” Rumination was measured with “I kept thinking about and dwelling on my anxiety.” Avoidance was measured with an item that read, “I tried to avoid thinking about what happened” (referred to as “avoidance” in our study), and experiential avoidance of anxiety was measured with an item that read, “I tried to control my anxiety-related feelings or thoughts,” which was drawn from a validated state measure of experiential avoidance [36]. Use of each strategy was rated on a 5-point scale ranging from 1=”not used at all” to 5 = ”used completely”. These items reflect the core content of the six strategies and do not alter the content structure of the emotion regulation strategies, which is in line with recent emotion regulation (ER) research that has employed experience-sampling methodology (ESM; real-time assessment at multiple time points in different contexts) [37,38].

Shooting performance.

Comprehensive evaluation of shooting performance is conducted through shooting accuracy and shooting stability, as demonstrated in studies by Ihalainen et al [39,40]. Shooting accuracy is measured by the radial distance from the center of the target to the hit point, which serves as a method to assess the shooting precision score. The shooting ring value (Score) accurately reflects shooting accuracy, ranging from 0 to 10.9. A higher shooting ring value indicates a shorter distance from the target center to the hit point, representing enhanced shooting accuracy and superior shooting performance [41]. Shooting stability primarily refers to the consistency and stability of the athlete’s shooting execution. It is commonly evaluated using the percentage of good ten-ring hits, which signifies the proportion of shots with a ten-ring value out of the total number of shots taken(The scoring rings on a shooting target are divided from the outer 6-ring to the central 10-ring, with each whole number ring further divided into 10 parts, ranging from 6.0 to 6.9, and so on, up to the central 10-ring which ranges from 10.0 to 10.9). A higher percentage of good ten-ring hits indicates better shooting stability [42]. During training and competitions, electronic target systems are utilized to record both the shooting Score and the percentage of good ten-ring hits.

2.3. Analysis

SPSS version 22.0 was used to conduct Difference Test, and R version 3.6.1 was used to conduct Multi-level Linear Model analysis. A two-level model was constructed with the dependent variables being the average shooting score and the proportion of good ten rings. Time-level (Level 1) linear mixed-effects models were conducted with lme4 [43]. Participants were treated as random effects in all mixed-effects models with a random intercept and no random slopes. Level 1 predictors were person-mean centered. Different levels of athletic ability was the second predictor. Full statistical information for each model was created using sjPlot [44]. Two effect sizes were calculated: marginal R2 m (i.e., the proportion of the total variance explained by the fixed effects) and conditional R2 c (i.e., the proportion of the total variance explained by both fixed and random effects) [45].

3. Results

3.1. Descriptive statistics

Descriptive statistics for all variables are presented in Table 1. There were significant differences in emotional intensity between athletes of different levels, with first-level athletes having significantly higher emotional intensity than elite-level athletes (t = 4.39, p < 0.001), but no significant difference in controllability. First-level athletes used more regulation strategies than national athletes on these two types of emotion regulation strategies, the First-level athletes used both types of strategies significantly more than the Elite-level athletes. In terms of shooting performance, first-level athletes had significantly lower good ten-ring ratios than national athletes.

Table 1. Descriptive statistics.

Level
First-level Elite-level t
Emotional Intensity 5.59(1.91) 4.8(1.72) 4.39***
Controllability 4.91(2.30) 5.34(2.26) −1.90
Contextual demand 7.50(2.06) 6.92(1.44) 3.213**
Engagement strategy 8.07(3.53) 6.47(3.02) 4.92***
Disengagement strategy 7.40(2.99) 6.02(2.24) 5.21***
Regulatory strategy type −0.68(4.03) −0.45(2.70) 0.656
Average Ring Value 9.92(0.33) 9.98(0.28) −1.95
Good Ten-ring Ratios 0.33(0.07) 0.40(0.07) −9.91***

Note:

*

 p < 0.05,

**

p < 0.01,

***

p < 0.001, the same below.

Emotional regulation flexibility is primarily characterized by individuals’ selection and application of regulatory strategies that are congruent with contextual demand, particularly in terms of emotional intensity and perceived controllability. Drawing from previous research on the relationship between contextual demands and the choice of emotional regulation strategies [19,23–25], contextual demand are composed of emotion intensity and controllability. When emotional intensity increases and controllability decreases, the demands on the individual’s context rise, prompting the selection of different strategies for regulation. Previous studies have separately examined the relationship between emotional intensity and controllability with the choice of strategy types, but these two variables collectively reflect contextual demands, and they are interdependent. When emotional intensity is high, controllability tends to be poor [20,26]. Therefore, after calculating the scores for the direction of controllability and adding them to the emotional intensity scores, the combined total reflects the contextual demands. The higher the total score, the greater the emotional intensity and uncontrollability, and the higher the need for regulation. The results are presented in Table 1, which shows that elite athletes have significantly lower regulatory demands compared to first-level athletes.

To more accurately assess the extent to which individuals select regulatory strategies congruent with their contextual demand, we calculated the individual’s daily propensity for choosing these strategies by determining the difference between disengagement strategy scores and engagement strategy scores. The findings indicate no significant differences in the types of regulatory strategies employed by elite athletes compared to first-level athletes. The results are shown in Table 1, a negative value for the regulation strategy type suggests that both groups predominantly favor engagement strategies, demonstrating a more proactive approach to adjusting their emotional experiences during training and competition.

Correlations for all variables are shown in Table 2. The correlation analysis between the contextual demand and regulatory strategy type showed that when the contextual demand is stronger (emotion intensity and perceived uncontrollability), athletes tend to choosed disengagement strategies (e.g., distraction); while when the contextual demand is lower, athletes tend to choose engagement strategies. The two indicators for evaluating athletic performance (Average Ring Value and Good Ten-ring Ratios) were not significantly correlated with the contextual demand and regulatory strategy type, because athletic performance is related to the entire flexible emotional regulation process rather than any specific aspect of it. The ICC showed that 82% and 56% of the variation in the regulatory strategy type, respectively, came from between individuals. Therefore, it is reasonable to further analyze the effects of between-group and within-group factors on shooting performance using a multilevel structural model.

Table 2. Correlation between contextual demand, regulatory strategy type and shooting performance.

ICC 1 2 3
  1. Contextual demand

0.65
  1. Regulatory strategy type

0.31 0.18**
  1. Average Ring Value

0.23 0.07 −0.40**
  1. Good Ten-ring Ratios

0.36 0.17** −0.12 *  0.46**

3.2. Hierarchical analysis on the influence of emotion regulation on shooting performance

Emotion regulation flexibility involves aligning regulatory strategies with contextual demands, referred to as situation-strategy fit (SSF). Based on current research-derived matching patterns (employing disengagement strategies when contextual demands are high and engagement strategies when contextual demands are low), the daily SSF of shooters can be calculated. This calculation involves multiplying the contextual demands by the regulatory strategies, providing a sensitive reflection of shooters’ flexibility in using matching strategies according to the level of contextual demands.

The aim of this study is to investigate whether shooting performance is more influenced by dynamic individual factors during the athlete’s competitive period or by stable within-person variables. To achieve this, a multilevel linear model was used to analyze longitudinal data over a period of 8 days. We first ran main effects models examining how psituation-strategy fit (SSF) predicted the shooting performance (see Table 3). Situation-strategy fit was entered as predictors in separate models, and average ring value and good ten-ring ratios was predicted separately.

Table 3. Main effects of situation-strategy fit on average ring value and good ten-ring ratios.

Average Ring Value Good Ten-ring Ratios
Predictor b CI t p b CI t p
Intercept 1.15 1.37, 1.78 25.02 <0.001 1.28 1.51, 1.93 23.18 <0.001
Situation-strategy fit 0.26 0.11, 0.37 6.01 <0.001 0.20 0.14, 0.47 8.21 <0.001
Observations 786 786
Marginal R2/Conditional R2 0.041/0.298 0.036/0.364

We then examined athletic level as a moderator of contextual demands and regulatory strategy type predicting shooting performance. In these models, shooting performance is the outcome, negative emotion contextual demand and tegulatory strategy type are the Level 1 predictors, and athletic level is a Level 2 moderator:

Day-level:Yij Performance=β0j+β1j Situation−strategyfit+rijPerson-level intercept:β0j=γ00+γ01 Level+μ0jPerson-level slope:β1j=γ10+γ11 Level+u1j

The Level *  Situation-strategy fit interaction terms represent a test of group differences; significant values indicate that situation-strategy fit predict performance for shooters with first-level than elite-level. Simple slopes represent the relationship between situation-strategy fit and shooting performance in each athletic level (i.e., First-level or elite-level). Full models are provided in Table 4.

Table 4. Multilevel models: Athletic level moderation of situation-strategy fit predicting shooting performance.

Average Ring Value Good Ten-ring Ratios
Predictor b CI t p b CI t p
Intercept 1.26 1.16, 1.48 26.19 <0.001 1.28 1.51, 1.93 23.18 <0.001
Situation-strategy fit 0.19 0.09, 0.41 6.83 <0.001 0.20 0.14, 0.47 8.21 <0.001
Athletic Level 0.42 0.31, 0.75 7.11 <0.001 0.25 0.08, 0.44 3.01 <0.001
Situation-strategy fit ×  Athletic Level −0.03 −0.12, 0.37 −0.41 0.518 0.22 0.17, 0.69 3.12 0.002
Observations 786 786
Marginal R2/Conditional R2 0.115/0.351 0.043/0.325
Simple Sloppe for
Elite-level athletes
0.08 0.01, 0.16 2.11 0.034 0.17 0.08, 0.27 3.87 <0.001
Simple Sloppe for
First-level athletes
−0.04 −0.03, 0.12 −1.28 0.201 0.12 0.09, 0.21 3.26 <0.001

In main effects models(see Table 4), higher situation-strategy fit was associated with higher good ten-ring ratios. Thus, the more situation-strategy fit shooters got, the greater they got shooting performance. Examination of simple slopes suggests this was true for elite-level athletes and first-level athletes. For good ten-ring ratios, there was a significant cross-level interaction, meaning that the strength of the relationship differed between atheltic levels participants. Specifically, situation-strategy fit and good ten-ring ratios were positively correlated in both groups, but the strength of this relationship was stronger for elite-level athletes than first-level athletes. In main effects models, higher situation-strategy fit was associated with average ring value. Examination of simple slopes suggests that for first-level athletes, situation-strategy fit was unrelated to average ring value. This differed from elite-level athletes, where higher situation-strategy fit was associated with average ring value.

4. Discussion

4.1. Differences in situational demands and the deployment of regulatory strategies among athletes of different level

First-level athletes experience greater emotional intensity and have lower controllability. Compared to elite-level athletes, they use emotional regulation strategies more frequently. First-level athletes have significantly lower shooting scores (Average Ring Value) and percentages of perfect scores (Good Ten-ring Ratios), which may be related to their differences in emotional regulation. Elite athletes exhibit significantly lower regulatory demands compared to first-level athletes. However, there is no significant disparity in the selection of regulatory strategy types between elite-level athletes and first-level athletes. Both groups employ engagement strategies more frequently, meaning they adjust their emotional feelings more diligently and actively during training and competitions. This is associated with the fact that shooting athletes place greater emphasis on emotion regulation. The shooting process demands high levels of focus from athletes and requires a lower level of emotional arousal [3,6], thus they tend to undertake emotional adjustments more proactively. The disengagement strategy scores suggest that low-level athletes utilize more strategies such as distraction and suppression of expression. Nevertheless, these disengagement strategies are not always detrimental, as elite-level athletes also employ a considerable number of disengagement strategies. When the contextual demand is stronger (emotional intensity and perceived uncontrollability), athletes tend to opt for disengagement strategies (e.g., distraction). This is in alignment with the findings of current research on the characteristics of emotional regulation flexibility [19,23–25]. When the background demand is high, that is, when the emotional intensity is high or the perceived controllability is low, an individual’s cognitive processing resources are in a strained state. Disengagement strategies have low demands on cognitive resources, and individuals’ utilization of these strategies can more effectively mitigate the detrimental impacts of negative emotions [20,42,46].

4.2. Hierarchical analysis of the influence emotional regulation on shooting performance

At the day-level, we explored the relationship between situation-strategy fit and shooting performance, and examined the predictive effect of situation-strategy fit on shooting performance at the individual level. This relationship was fully validated among elite-level athletes, but among first-level athletes, only the significant prediction of situation-strategy fit on good ten-ring ratios was verified. Situation-strategy fit is a core characteristic of emotional regulation flexibility [22,23]. Previous studies have demonstrated the match by examining the relationship between situational demands and strategy use. Situational demands often encompass emotional intensity and perceived controllability [20,26]. Individuals’ perceptions of controllability are a key factor in the emotional regulation process and often influence their choice of emotional regulation strategies. When the level of controllability is higher, individuals tend to choose strategies such as suppression and avoidance [20,46]. In contrast to suppressing emotional experiences, suppressing physiological responses to emotions can improve performance [17]. The emotional experience of shooting athletes during competition is often influenced by their performance and physiological changes [1,6]. Studies have shown that athletes who use disengagement strategies more often have lower shooting performance, possibly because they use more disengagement strategies in the emotional experience component of emotions, which alleviates their subjective emotional experience, but their heart rate, breathing, and other physiological indicators remain high, affecting their stability during competition [3,6]. Emotions are a key factor in influencing athletic performance, and different emotional intensities have different effects. When the intensity of negative emotions is low, the emotion regulation strategy of expressive suppression, by avoiding or deliberately ignoring bodily sensations, reduces over-exertion due to tension while improving the accuracy of the shot [17]. The emotional regulation process is a crucial factor influencing athletic performance, broadly affecting the execution of movements. Relying solely on individual factors within the emotional regulation process (e.g., emotions, emotional regulation strategies) can no longer accurately reflect the effectiveness of emotional regulation in complex sports situations [1,11]. It is necessary to integrate these factors to predict athletic performance. In this study, the relationship between situation-strategy fit and athletic performance, as we hypothesized, showed that the higher the fit, the better the athletic performance. The fit between situation-strategy is a core characteristic of emotional regulation flexibility [22,23]. Previous research has demonstrated the match by exploring the relationship between situational demands and strategy use. Situational demands often include emotional intensity and perceived controllability [20,26].

The emotional regulation process is a critical factor influencing athletic performance, broadly affecting the execution of movements. Relying solely on individual factors within the emotional regulation process (e.g., emotions, emotional regulation strategies) can no longer accurately reflect the effectiveness of emotional regulation in complex sports situations [1,11]. It is necessary to integrate these factors to predict athletic performance. In this study, the relationship between situation-strategy fit and athletic performance, as we hypothesized, showed that the higher the fit, the better the athletic performance. The fit between situation-strategy is a core characteristic of emotional regulation flexibility [22,23]. Previous research has demonstrated the match by examining the relationship between situational demands and strategy use. Situational demands often include emotional intensity and perceived controllability [20,26].

Adding a second layer of variables, athletic level comprehensively reflects the athlete’s tactical and technical level, including the level of psychological skills. Studies have shown that elite athletes have higher psychological adjustment capabilities [8,11]. Therefore, we examined whether athletes at two levels differ in the prediction of emotion regulation on athletic performance. The results were as expected, with elite-level athletes’ situation-strategy fit being a stronger predictor of two indicators of shooting performance. Compared to first-level athletes, elite-level athletes have higher average ring values and good ten-ring ratios when using engagement strategies under lower contextual demand and using disengagement strategies under higher contextual demand. First-level athletes may have a mismatch between perceived situational demands and regulation strategies. This may be because first-level athletes do not necessarily use regulation strategies when they perceive situational demands [20,47]. In addition, engagement strategies are more effective at regulating low-intensity emotions but require a greater allocation of cognitive resources [24]. The execution of shooting movements requires the shooter to concentrate a large amount of attention resources [1,12,24], and first-level shooters may not have the ability to allocate attention resources well. In subsequent data, we further compared the situation-strategy fit of the two groups of athletes and found a marginally significant difference, with elite-level athletes being higher.

Thus, the emotional regulation process has a significant impact on shooting sports performance, and the ability to use matching strategies in situational demands affects the effectiveness of emotional regulation. Situation-strategy fit can serve as an important predictive factor for athletic performance. This suggests that improving athletes’ flexible use of emotion regulation strategies may help improve shooting performance.

5. Limitations

Shooting athletes select and use different regulation strategies according to situational demands. This study attempts to elucidate the impact of emotional regulation flexibility on shooting performance by comparing emotional regulation differences between first-level and elite-level athletes. The situation-strategy fit of elite-level athletes is higher, and their prediction of shooting performance is stronger. However, first-level athletes perform unsatisfactorily in situation-strategy fit. The disparity in their emotional regulation contextual demands and strategies may be a crucial reason for the variance in their training and competition performance. By promptly recalling and recording emotions and regulation processes after tasks, this study more realistically reflects the impact of emotional regulation processes on athletic performance during athletic competition with higher ecological validity. However, athletes’ retrospective assessment of emotional induction, intensity, and controllability is an evaluation of the overall situation over a short period, not the emotional intensity and controllability that occur in real-time during training and competitions. This also makes it difficult to examine the dynamic changes in athletes’ emotional regulation strategies and situational demands over this period. This is an inherent limitation of survey research, which is the inability to record more detailed data more densely. Research that relies solely on retrospective self-report data demands that athletes a) thoroughly remember their emotions and strategies, and b) be able to clearly identify the strategies they have employed, which is a challenging task. Although we have endeavored to minimize this bias by employing immediate post-event recall methods during our study, the inherent limitations of retrospective surveys in accurately reflecting real-time dynamic changes are inescapable.

The dynamic variations in emotional regulation strategies, which are context-dependent and not accurately detectable by currently recognized measurement tools, represent a challenge. The measurement tool employed in this study was developed by integrating core characteristics of strategies into new items based on the original Emotional Regulation Strategy Scale, which may limit the measurement validity. Future research could further validate the measurement validity in such diary studies by selecting different validity indicators. Additionally, the physiological changes during emotional regulation and the shooting process, such as heart rate and EEG, could not be effectively collected due to restrictions imposed by training and competition conditions, which do not permit athletes to wear any monitoring devices. Using subjective assessment methods to examine the induced emotions (emotional intensity) in individuals is not sufficiently clear and may be subject to bias. This may result in a lack of physiological evidence to support the data analysis. The computational method for emotion regulation flexibility, which was first used after a thorough review and respect for consistent research findings, can accurately reflect the core features of emotion regulation flexibility, namely, the matching between context and strategy. Meanwhile, further validation from different research backgrounds is needed. In the future, more rigorous experimental studies will be conducted to further explore whether this matching between context and strategy is universally present.

6. Perspects

Further experimental studies are needed to accurately reflect which emotional regulation strategies athletes choose under different emotional intensities and controllability, and to reveal which key link in the emotional regulation process has a greater impact on behavioral performance. In addition, the effects of different emotional regulation strategies on emotional experience, physiological components, and cognitive components are not entirely similar. Future studies should explore this further in order to provide more specific guidance for emotional regulation that enhances athletic performance.

7. Conclusion

Emotional regulation is often considered a crucial component of athletes’ psychological abilities [8,12] Beatty, 2019;. Athletes often employ a variety of emotion regulation strategies to modulate intense emotional fluctuations, thereby promoting competitive performance [9]. The complexity and variability of sports situations demand that athletes flexibly use different regulation strategies according to situational needs. The primary purpose of athletes’ emotion regulation is to enhance athletic performance. Therefore, exploring the relationship between flexible emotion regulation processes and sports performance can provide directional guidance for emotional regulation training.

Our results lead to the following conclusions. First-level athletes have a higher contextual demand for emotion regulation and tend to use disengagement strategies more frequently to regulate emotions. The situation-strategy fit is characterized by the use of disengagement strategies in high situational demand and engagement strategies in low situational demand. This match exerts different impacts on shooting performance between the two groups. Elite-level athletes have higher average ring values and good ten-ring ratios when using engagement strategies under lower contextual demand and using disengagement strategies under higher contextual demand. First-level athletes may have a mismatch between perceived situational demands and regulation strategies. Therefore, enhancing flexible emotional regulation training that improves situation-strategy fit may be beneficial for enhancing sports performance.

Supporting information

S1 Data. Research data set.

(CSV)

pone.0318872.s001.csv (62.9KB, csv)
S2 Data. An introduction to the naming of variables in the study.

(CSV)

pone.0318872.s002.csv (395B, csv)

Acknowledgments

We thank Cai Yalin, Peng Duobao, and Liu Bin for their instrumental help with data collection.

Data Availability

The dataset for this study is available on Github, and the direct link to freely access the data set is https://github.com/ZhouLulu-cloud/Effect-of-Emotional-Regulation-on-Performance-of-Shooters-during-Competition.git.

Funding Statement

Psychological Capacity Evaluation and Talent Selection Research of High-level Shooting and Archery Athletes” (2024JT07). The funders played a significant role in sourcing data for this paper by connecting us with collaborative units for receipt collection and program implementation.

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Decision Letter 0

Michael B Steinborn

16 Sep 2024

PONE-D-24-25633Effect of Emotional Regulation on Performance of Shooters during Competition: an Ecological Momentary  Assessment StudyPLOS ONE

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Reviewer #1: In this study, the authors assessed emotion regulation strategies in female and male shooters at both first-level and national-level using longitudinal ecological momentary assessment (EMA). They aimed to predict the impact of these strategies on shooting performance. The results revealed differences in emotion regulation based on gender and skill level, and their relation to shooting performance.

The study is compelling, with the use of EMA enhancing the ecological validity of the findings. However, the manuscript lacks clarity in several sections. Additional analyses could better address the research questions posed by the authors. While the discussion provides sufficient explanations for many results, it overlooks some key points. Therefore, I recommend a major revision of the manuscript.

See below for detailed feedback Unfortunately, the authors did not provide page or line numbers. Therefore, I will refer to section headings in my feedback:

1. In the Abstract, you state: “Inaccurate perception of situational demands and difficulty in using engagement strategies are the main emotion regulation processes that affect athletic performance.” However, this conclusion appears to be unsupported by the presented results. The study does not seem to assess the accuracy of athletes' perception of situational demands. Moreover, this statement does not align with the primary findings of your paper, which focus on the differences in emotion regulation strategies between male and female athletes, as well as between first-level and national-level competitors. Consider revising the Abstract to more accurately reflect the key points and results of your research.

2. You refer to the flexibility in the usage of emotion regulation strategies. However, it is unclear which results of your study indicate high or low flexibility. Is it the sum score of the usage of all strategies? Conclusions regarding overall flexibility would require calculating a variable that numerically captures this construct. I am not sure if your data can provide information on emotional flexibility. Additionally, interpreting this in absolute terms would be difficult, as you would require a non-athlete control group to determine if your sample is indeed less flexible in their usage of emotional control strategies. Therefore, I suggest that you only interpret differences between your subgroups (gender and skill level). If you cannot operationalize the flexibility in emotional regulation, please avoid jumping to conclusions (e.g., “Athletes had low flexibility in emotion regulation …” [Abstract], “Low-level athletes have lower emotional regulation flexibility compared to high-level athletes, and they demonstrate inflexibility in both situational demands and specific” [4. Limitations], etc.).

3. You use some terminology from shooting sports that laypeople (such as myself) might find difficult to understand. Specifically, please elaborate on the outcomes of your models:

- What is the “proportion of good ten rings” [2.4 Analysis] exactly?

- What is meant by “speed of grip force” [Section 1.1] and how is it related to shooting performance?

- What exactly is meant by “slow the production of force” [Section 3.2] and again, how does this relate to performance?

Additionally, in Section 1.3 you refer to “rapidly changing competitive sports situations.” What do you mean by that? How is this related to shooting (i.e., what are the changing situations in a shooting competition)?

4. Regarding your power analysis: If I am not mistaken, gPower is not able to perform power analyses for multilevel linear models. It appears that you computed a power analysis for a linear multiple regression with 4 predictors, resulting in the reported detectable effect sizes of f²=0.20 (I assume that you refer to the effect size parameter f², please make so explicitly). However, a power analysis based on a (non-hierarchical) linear regression is not suitable for a multilevel analysis.

Please conduct a suitable power analysis (for example, using a simulation-based approach) or use another method of justification for your sample size. You may find the following resource helpful:

https://online.ucpress.edu/collabra/article/8/1/33267/120491/Sample-Size-Justification https://shiny.ieis.tue.nl/sample_size_justification/

5. Please report how many surveys were completed and the extent of dropout you experienced. Additionally, specify if you had any exclusion criteria for the data, such as excluding participants with a survey completion rate below a certain threshold.

6. Please provide all survey questions asked in the 2.2 Measures section. The questions for the triggering event and the emotional intensity are missing.

7. Please report the nationalities of the athletes.

8. The main effect models are interesting, but what about Level 1 interactions? At least two-way interactions might yield interesting results, especially in light of the literature, which has shown that engagement strategies are most effective in low-intensity emotional contexts, while disengagement strategies are more effective in high-intensity emotional contexts. You make several remarks regarding such an interaction:

- “Strategies that require more participation and effort, such as cognitive reappraisal, may be most effective in regulating low-intensity emotions, whereas strategies that involve disengagement from stimuli, such as distraction, may be most effective in regulating high-intensity emotions” [Section 1.3]

-“In addition, engagement strategies are more effective at regulating low-intensity emotions, but require a greater allocation of cognitive resources” [Section 3.2]

Exploring these interactions in your models could provide a deeper understanding of how emotion regulation strategies function under varying emotional intensities. I would thus suggest to include a fourth model which encapsulates all two-way interactions of level 1 variables. I would thus suggest including a fourth model that encapsulates all two-way interactions of Level 1 variables. This additional analysis could provide a deeper understanding of how different emotion regulation strategies function under varying emotional intensities and contexts.

9. To strengthen the analysis, I suggest performing a model comparison analysis. Since Model 1 is not nested within Model 2, using an Information Criterion like the Akaike Information Criterion (AIC) and/or the Bayesian Information Criterion (BIC) would be appropriate. These criteria allow for the comparison of non-nested models by evaluating the trade-off between model fit and complexity.

10. At the moment, you only report the random intercept. Could you also report the random effects of gender and (skill-)level?

11. I noticed some inconsistencies in your descriptives, specifically in Table 1: The average ring value is approximately 10, or exactly 10.00 for male athletes. Isn’t this the highest possible value achievable, meaning that they shot the center of the target almost every time (I apologize, I am a layperson regarding shooting)? Is this correct? Could there be a ceiling effect in accuracy? Additionally, how does this align with the ten-ring ratio being approximately 35%? Shouldn’t this be close to 100% if the average ring value was 10? Please clarify these points and explain the potential discrepancy between the average ring value and the ten-ring ratio.

Also, please add some context regarding the highest achievable score in the average ring value. If these numbers are indeed correct, you should discuss these near-perfect performances of the athletes and the possible ceiling effects. This context will help readers better understand the skill level of the athletes and the implications for your study's findings.

12. “National-level athletes have higher performance levels and significant differences in emotional experience and use of regulatory strategies, which may account for the significant differences in shooting performance.” [Section 3.1] This conclusion is likely confounded with athlete experience and habituation. National-level athletes have probably competed in many competitions and might have habituated to the emotional distress experienced during competition. Their experience might also be a reason for the better performance, raising the question of whether emotion regulation strategies are indeed the primary reason behind their greater success. Please discuss these results more carefully.

13. The discussion of gender differences in Section 3.1 is somewhat brief. Please elaborate further on the differing results for females compared to males. What are the implications of these findings, and why do these differences exist?

14. “However, the intensity and controllability of emotions are averaged, making it difficult to examine the variability and degree of adaptation of emotional regulation strategies under different situational demands.” [Section 4. Limitations] I do not understand this limitation. You used a hierarchical model for your analysis, so you did not average over intensity and controllability of emotions, correct?

15. Please discuss the limitations in more detail. For instance, you relied solely on retrospective self-reported data. This requires athletes to a) remember their emotions and strategies thoroughly and b) be able to clearly identify their used strategy, a task that is arguably even hard for mental health practitioners. Also, you did not assess physiological data, which might be crucial to understand in light of the shooting performance. Additionally, the lack of preregistration is a significant limitation, as preregistration is considered part of good scientific practice. Please reflect on these and any other limitations in your study.

16. A Conclusion section at the end of your discussion would round off the paper nicely.

17. The manuscript would benefit from increased clarity in certain sections. For instance:

• “Expressive suppression is the most commonly used strategy by athletes in intense competition with limited time (Beatty & Janelle,2016), but the effective time is short, and the negative experience caused by high intensity may disrupt the movement structure.” [Section 1.1] Could you please elaborate on the statement “and the negative experience caused by high intensity may disrupt the movement structure”? This phrase would benefit from further explanation to clarify its meaning and implications

• “The prerequisite for effective emotion regulation strategies is the context that triggers emotional changes.” [Section 1.1] Unfortunately, I do not understand what you mean. Could you clarify this?

• “Previous studies have focused on exploring regulation strategies or patterns that are applicable to sport situations, and compared to life situations, sport situations are constantly changing, and the applicability of specific regulation strategies is challenged.” [Section 1.1] What do you mean by “compared to life situations, sport situations are constantly changing”? It's debatable whether sport situations are inherently more dynamic than everyday life scenarios, which can also be highly variable and unpredictable. Could you please elaborate on this comparison and provide evidence or specific examples to support your assertion?

• “The ability-based model suggests that emotional clarity, emotional tolerance, and emotional regulation flexibility are the potential for individuals to regulate emotions.” [Section 1.2] Please clarify what you mean by “are the potential for individuals to regulate emotions”

• “Rumination (disengagement with a tendency to avoid difficulties) is also classified as a disengagement strategy (Goodman,2021)”I don’t understand what is meant by “disengagement with a tendency to avoid difficulties”, please clarify. [Section 1.2]

• “However, in rapidly changing competitive sports situations, the effects of specific emotion regulation strategies are not stable, and athletes need to flexibly choose and use different strategies based on changes in the situation to achieve good results.” [Section 1.3] What do you mean by “rapidly changing competitive sports situations”. How does this specifically relate to shooting?

• “…the second-level variables were individual differences among participants (level, gender)” At this point in the manuscript, it was unclear to me, what “level” means. Maybe re-label it to “skill-level” or something more comprehendible.

• “Model 2: A regression model with mean as the outcome variable is used to conduct […]” [Section 3.2] Please clarify which mean (of what?) is used as an outcome

18. Your manuscript sometimes uses inconsistent terminology which impairs flow and understandability:

• You define “the proportion of good ten rings” [2.4 Analysis] as one of the outcomes. However, you refer to this outcome as “Ten-ring Rations” [Table 1 to Table 3], or “proportion of perfect scores” [Section 3.2].

• You refer to one type of emotion regulation strategies as “engagement strategies” but you refer to this as “participation strategy” in Section 3.2

19. Some statements in your manuscript require literature references:

• “It can be seen that the effect of specific emotion regulation strategies is not stable.” [Section 1.1]

• “Regulation strategies that successfully regulate emotions or tolerate aversive emotions are better suited for athletes to achieve their goal of enhancing sport performance than regulation strategies that are more adaptable to individual psychological health development.” [Section 1.2]

• “Compared to male athletes, female athletes use six emotional regulation strategies more frequently, which is consistent with findings from studies of college students that show stable gender differences in the emotional regulation process.” [Section 3.1]

• “This may be because females have more complex emotions than males.” [Section 3.2] This is a strong claim and urgently needs a reference!

• “Women are more sensitive to situational demands and use more regulatory strategies.” [Section 3.2]

• “In addition, engagement strategies are more effective at regulating low-intensity emotions, but require a greater allocation of cognitive resources.” [Section 3.2]

20. There seems to be a citation error in Section 3.2:

• “In contrast to suppressing emotional experiences, suppressing physiological responses to emotions can improve performance(18).” (no author or year provided)

Reviewer #2: The authors aimed to examine the effect of emotion regulation on

shooting performance in shooting athletes. I have a few questions regarding the methodology.

1. The authors mentioned that they used statistical software for data processing. However, the explanation lacked detail, such as which menus or features were utilized. This level of detail was necessary to allow other researchers to replicate the study described in this manuscript. As a suggestion, researchers could consider using statistical analysis with programming languages to facilitate easier replication.

2. In the manuscript, the authors mentioned the term 'ACC' but never explained its meaning. This could make it difficult for general readers to understand its significance.

3. The authors developed three regression models. In the first model, a two-level approach was used. In the second model, no predictors were included at the second level. Why did the authors choose not to use a standard multiple regression model? It appears there is no significant difference. Please explain.

4. In the second model, the authors coded gender as 1 for males and 2 for females. Why did not the authors use 0 for males and 1 for females, given that gender was nominal and not ordinal? Please explain.

5. The researchers should consider providing the equation form of all the models generated, including the value of each coefficient and intercept. This will allow readers to visually assess the influence of each predictor on the target.

The manuscript has the potential to be published. However, certain aspects, particularly in the methodology, require a more detailed explanation regarding how the conclusions were reached.

Reviewer #3: Introduction

The introduction is written quite well.

Method

Unfortunately, I regret to say that the work contains some serious problems.

- The problem of the origin of the items:

- The authors point out that they largely chose items from other questionnaires to measure emotion regulation strategies, e.g. for cognitive reappraisal the item chosen was: ‘I tried to think about the situation differently.’ from the ‘reappraisal subscale’ of the Emotion Regulation Questionnaire (ERQ) by Gross, John (2003). The item ‘I made sure not to express what I was feeling’ according to the authors was selected from the same questionnaire (ERQ) to determine the Expressive suppression strategy. The ERQ questionnaire is very well known. Although the authors' items are somewhat related in content to the items in the questionnaire, I did not find items in the ERQ with the same content as presented by the authors (see Gross, John 2003, Table 2 - 1-reappraisal factor, 2-suppression factor).

- The authors indicate that ‘Acceptance was measured with an item derived from acceptance and mindfulness measures (Baer et al., 2004), “I tried to notice my thoughts and feelings without thinking of them as good or bad”. In the questionnaire in the source given, I also did not find an item with such content as indicated by the authors (see Baer et al., 2004 - Table 1 - Kentucky Inventory of Mindfulness Skills). There is instead a item such as: ‘I make judgments about whether my thoughts are good or bad’.

- The authors also indicate that ‘Rumination was measured with an item derived from rumination measures (Treynor et al., 2003), “I kept thinking about and dwelling on my anxiety.”. I did not find such an item in the scale provided in the literature either (see Treynor et al., 2003 - Table 1 - Ruminative Responses Scale).

It is therefore difficult to know where the items presented come from, and if they are related to the content of items from other questionnaires, what modifications they have undergone.

- methodological problem:

Authors used single items with unknown validity and reliability to measure emotion regulation strategies. Even if we assume that a single item was selected from a validated and standardised questionnaire, the validity and reliability of a single item is unknown. Short versions of questionnaires are often used, but these require full re-validation (regardless of the original version). On the other hand, shortening a subscale of a questionnaire to a single item, which in addition has been chosen arbitrarily, is an oversimplification. Unfortunately, a scale consisting of a single item is often too short to be reliable, and the use of a single item is particularly discouraged when measuring such broad constructs as personality or emotional processes. The authors further pointed out, for example, that a specific question was used to measure emotional intensity. When it comes to emotional process, it is very difficult to even assess the reliability of such a single-question scale (test-retest), as this phenomenon is very dynamic. To measure emotion regulation strategies, I would suggest using a short, but recognised, standardised and validated questionnaire or constructing and validating your own questionnaire where the subscale consists of more than one item.

- The authors further write: ‘These strategies include cognitive appraisal, acceptance, problem solving, emotional suppression, rumination, and avoidance. The first three are categorised as engagement strategies, while the latter three are categorised as disengagement strategies'. - The authors selected some items and created new subscales from them as they saw fit. The authors then also analysed the results in the proposed subscales. This approach is also methodologically questionable. Combining selected questions into new subscales or questionnaires would have required theoretical analysis and psychometric re-validation, which unfortunately the authors did not do. In order to create new subscales from the questions used, it would have been necessary to first provide a theoretical perspective on the rationale for their creation, and then perform a psychometric analysis to verify the validity of the approach used.

- In addition, some questions, unfortunately, need to be more explicit, e.g., the item on intensity of emotion would require clarification of what emotion is meant, e.g., positive, negative, etc.

- The authors further indicate” The number of participants required to compute the multilevel linear model with four predictor variables and two-tailed tests using Gpower3.1 was over 42, which provides sufficient power (i.e., greater than .80) to detect effect sizes ≥ .20.” Unfortunately, there are many more than 4 predictors in the model presented. In the final model presented in Table 3, there are as many as 8 expressions for fixed effects, and even before interaction effects, single predictors (without interaction) should still be included, resulting in a much larger number of predictors. Besides, the sample size should be determined for a specific effect size, among other things. It is not known what the name of the effect proposed in the paper is, and hence, among other things, it is difficult to assess its strength so as to determine the sample size. On another note, it is not known how the sample size was determined for such advanced models taking into account both fixed and random effects using Gpower3.1 software.

Results

- The authors indicate that: “Using ecological momentary assessment, we followed 57 athletes during competitions for a period of 6 days before the competition and 2 days during the competition” and then write that a multilevel linear model was used to analyze the longitudinal data. The main purpose of longitudinal research and analysis is to analyze changes over time in relation to various variables. Unfortunately, the authors did not model the time factor, and the data was analyzed as if it had been collected at one time. So I suggest including time factor as a fundamental element in the analysis of longitudinal studies. A good source for longitudinal analysis in multilevel modeling is a widely available textbook: Heck, R. H., Thomas, S. L., & Tabata, L. N. (2013). Multilevel and longitudinal modeling with IBM SPSS. Routledge.

- In addition, the models presented are problematic from a statistical point of view. The authors only presented interaction effects in fixed effects in final model 3, and they should estimate and present all terms (including also effects for single variables without interaction).

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PLoS One. 2025 Mar 25;20(3):e0318872. doi: 10.1371/journal.pone.0318872.r003

Author response to Decision Letter 1


28 Oct 2024

Response Editor,

Thank you for your review of our manuscript. We have carefully considered the feedback from you and the reviewers, and have made comprehensive revisions and adjustments to the entire text. We have addressed the four main issues with significant modifications and have uploaded the manuscript with track changes as requested. We have responded to each reviewer's questions point by point.

Additionally, we have conducted further literature reviews, integrating the opinions of the reviewers with previous research to address each question. The revisions made to these issues have enhanced our understanding of the article, and we are grateful for your and the reviewers' valuable input.

Reviewer #1

Response:We are very grateful for your comments regarding our manuscript “Effect of Emotional Regulation on Performance of Shooters during Competition: an Ecological Momentary Assessment”  All your suggestions are very important to us, both for composing the manuscript and our further research. We have studied comments carefully and have made corrections which we hope meet with approval.  Based on your advice, we amended the relevantsection in the manuscript. All your questions are answered below.

1. Consider revising the Abstract to more accurately reflect the key points and results of your research.

Response: Thank you for your insightful advisement. We have revised the statements regarding the key points and results in the abstract.

2. You refer to the flexibility in the usage of emotion regulation strategies. However, it is unclear which results of your study indicate high or low flexibility. Is it the sum score of the usage of all strategies? Conclusions regarding overall flexibility would require calculating a variable that numerically captures this construct. I am not sure if your data can provide information on emotional flexibility. Additionally, interpreting this in absolute terms would be difficult, as you would require a non-athlete control group to determine if your sample is indeed less flexible in their usage of emotional control strategies. Therefore, I suggest that you only interpret differences between your subgroups (gender and skill level). If you cannot operationalize the flexibility in emotional regulation, please avoid jumping to conclusions (e.g., “Athletes had low flexibility in emotion regulation …” [Abstract], “Low-level athletes have lower emotional regulation flexibility compared to high-level athletes, and they demonstrate inflexibility in both situational demands and specific” [4. Limitations], etc.).

Response: We are very grateful for your valuable suggestions. The calculation of emotion regulation flexibility is not about the total score of all strategies used. Emotion regulation flexibility is primarily reflected in the process by which individuals select appropriate matching strategies based on contextual demands (Naragon-Gainey et al., 2017; Martins et al., 2018; Sheppes & Meiran, 2008; Ortner & Pennekamp, 2020). Therefore, we have readjusted the calculation indicators of emotion regulation flexibility to make them more explicit. Previously, the calculation method separately computed and incorporated contextual demands and strategies into the model. Now, integrating the two into one indicator to reflect emotion regulation flexibility is more reasonable. We have also revised the limitations section regarding the comparison of emotion regulation flexibility among athletes of different skill levels.

3. You use some terminology from shooting sports that laypeople (such as myself) might find difficult to understand. Specifically, please elaborate on the outcomes of your models:

- What is the “proportion of good ten rings” [2.4 Analysis] exactly?

- What is meant by “speed of grip force” [Section 1.1] and how is it related to shooting performance?

- What exactly is meant by “slow the production of force” [Section 3.2] and again, how does this relate to performance?

Additionally, in Section 1.3 you refer to “rapidly changing competitive sports situations.” What do you mean by that? How is this related to shooting (i.e., what are the changing situations in a shooting competition)?

Response:Thank you very much for your invaluable suggestions, esteemed expert. I have incorporated explanations regarding the evaluation indicators of shooting performance into the corresponding sections of the text. Specifically, in Section 2.4, I have added introductions to the concepts and measurement methods of shooting ring value and the "proportion of good ten ring," as well as the data acquisition approaches. Additionally, based on a review of the original literature, I have further elaborated on "speed of grip force" in Section 1.1 and "slow the production of force" in Section 3.2. In Section 1.3, I have also included further clarifications of related concepts to rectify any previously unclear explanations. Your guidance has significantly enhanced the quality and clarity of the text.

4. Regarding your power analysis: If I am not mistaken, gPower is not able to perform power analyses for multilevel linear models. It appears that you computed a power analysis for a linear multiple regression with 4 predictors, resulting in the reported detectable effect sizes of f²=0.20 (I assume that you refer to the effect size parameter f², please make so explicitly). However, a power analysis based on a (non-hierarchical) linear regression is not suitable for a multilevel analysis.

Please conduct a suitable power analysis (for example, using a simulation-based approach) or use another method of justification for your sample size. You may find the following resource helpful:

https://online.ucpress.edu/collabra/article/8/1/33267/120491/Sample-Size-Justification https://shiny.ieis.tue.nl/sample_size_justification/

Response: Thank you very much for the resources and guidance you provided. We have carefully reviewed the relevant papers and instructional methods to correct our previous incorrect method for sample size calculation. Regarding the power analysis for MLM (multilevel modeling), we utilized the powerSim() function to simulate sample size calculation using the Monte Carlo method (Bolger & Laurenceau, 2013).

5. Please report how many surveys were completed and the extent of dropout you experienced. Additionally, specify if you had any exclusion criteria for the data, such as excluding participants with a survey completion rate below a certain threshold.

Response: Thank you for the reviewer's suggestions. We have incorporated the criteria for data exclusion in Section 2.1.

6. Please provide all survey questions asked in the 2.2 Measures section. The questions for the triggering event and the emotional intensity are missing.

Response: Thank you for the rigorous review, expert. We have supplemented the section on Contextual Demands with items related to triggering events and emotional intensity in the manuscript.

7. Please report the nationalities of the athletes.

Response: Additional clarification regarding the athletes' nationalities has been included in Section 2.1 of the manuscript.

8. The main effect models are interesting, but what about Level 1 interactions? At least two-way interactions might yield interesting results, especially in light of the literature, which has shown that engagement strategies are most effective in low-intensity emotional contexts, while disengagement strategies are more effective in high-intensity emotional contexts. You make several remarks regarding such an interaction:

- “Strategies that require more participation and effort, such as cognitive reappraisal, may be most effective in regulating low-intensity emotions, whereas strategies that involve disengagement from stimuli, such as distraction, may be most effective in regulating high-intensity emotions” [Section 1.3]-“In addition, engagement strategies are more effective at regulating low-intensity emotions, but require a greater allocation of cognitive resources” [Section 3.2]

Exploring these interactions in your models could provide a deeper understanding of how emotion regulation strategies function under varying emotional intensities. I would thus suggest to include a fourth model which encapsulates all two-way interactions of level 1 variables. I would thus suggest including a fourth model that encapsulates all two-way interactions of Level 1 variables. This additional analysis could provide a deeper understanding of how different emotion regulation strategies function under varying emotional intensities and contexts.

Response: Thank you very much for your detailed guidance. The interaction between situational demands and regulatory strategies has a significant impact on athletic performance, which is the focus of our research. It has been effectively concluded in previous studies that the engagement strategy is more effective under high situational demands, while the disengagement strategy is more effective under low situational demands. However, the impact of these interactive effects on athletic performance is the issue that this study is more concerned with. We have conducted a comprehensive discussion and repeated research, and made adjustments in the model part of the data analysis. Situational needs and emotional regulation strategies are considered as first-level variables, and different skill levels are considered as second-level variables. We analyze the impact of this interaction on athletic performance, while also testing whether this impact is consistent across groups of different athletic levels.

9. To strengthen the analysis, I suggest performing a model comparison analysis. Since Model 1 is not nested within Model 2, using an Information Criterion like the Akaike Information Criterion (AIC) and/or the Bayesian Information Criterion (BIC) would be appropriate. These criteria allow for the comparison of non-nested models by evaluating the trade-off between model fit and complexity.

Response: Thank you for your valuable suggestions, which have greatly supported my systematic understanding of the differences between report models. In future studies of this kind, I will complete my thesis report according to your advice. As we have currently overhauled the data analysis model, there is no comparative information between multiple models presented at the moment.

10. At the moment, you only report the random intercept. Could you also report the random effects of gender and (skill-)level?

Response: After reviewing the literature, we have changed our previous data analysis method. Considering that the article focuses on the relationship between situational demands and strategies in emotional regulation (two important processes of emotional regulation), we have integrated indicators of emotional regulation flexibility to more effectively reflect the dynamic relationship between emotional regulation and athletic performance. We have altered the analysis model used before, adding reports of random effects of skill level in the new analysis. Since previous studies have shown that gender only differs in emotional regulation strategies, considering that the research focus is on the flexibility of emotional regulation and shooting performance, which is more likely to be affected by different levels of athletic skill. Therefore, gender is included in the analysis as a control variable.

11. I noticed some inconsistencies in your descriptives, specifically in Table 1: The average ring value is approximately 10, or exactly 10.00 for male athletes. Isn’t this the highest possible value achievable, meaning that they shot the center of the target almost every time (I apologize, I am a layperson regarding shooting)? Is this correct? Could there be a ceiling effect in accuracy? Additionally, how does this align with the ten-ring ratio being approximately 35%? Shouldn’t this be close to 100% if the average ring value was 10? Please clarify these points and explain the potential discrepancy between the average ring value and the ten-ring ratio.

Response: Thank you for your valuable feedback. The scoring rings on the shooting target range from the outer 6-ring to the central 10-ring, with each whole number ring being divided into 10 parts (from 6.0 to 6.9, and so on, with the central 10-ring ranging from 10.0 to 10.9). The precise ring value recorded for the shooter includes a decimal point. A "good ten" usually refers to a score above 10.0. We have added this explanation in the section of the paper that measures shooting performance.

12. “National-level athletes have higher performance levels and significant differences in emotional experience and use of regulatory strategies, which may account for the significant differences in shooting performance.” [Section 3.1] This conclusion is likely confounded with athlete experience and habituation. National-level athletes have probably competed in many competitions and might have habituated to the emotional distress experienced during competition. Their experience might also be a reason for the better performance, raising the question of whether emotion regulation strategies are indeed the primary reason behind their greater success. Please discuss these results more carefully.

Response: Thank you for this valuable suggestion. We have revised some of the content in the discussion section.

13. The discussion of gender differences in Section 3.1 is somewhat brief. Please elaborate further on the differing results for females compared to males. What are the implications of these findings, and why do these differences exist?

Response: Thank you for your insightful question. Regarding gender differences, past research has primarily shown that they manifest in emotional regulation, such as women experiencing emotions more intensely and having a larger repertoire of emotional regulation strategies. However, in terms of overall emotional regulation capabilities, there is no significant gender difference. In our previous analysis, we did include gender as a variable in the model. But in our current revision of the paper, considering that the focus of the study is on the relationship between emotional regulation flexibility and athletic performance, we are treating gender as a control variable. Instead, we are exploring the impact of emotional regulation flexibility on athletic performance across athletes of varying skill levels to see if there are differences. Comparing this influence between genders seems unreasonable since there is no significant gender difference in emotional regulation capabilities and shooting performance. We have added this explanation in the section of the paper that discusses the measurement of shooting performance.

14. “However, the intensity and controllability of emotions are averaged, making it difficult to examine the variability and degree of adaptation of emotional regulation strategies under different situational demands.” [Section 4. Limitations] I do not understand this limitation. You used a hierarchical model for your analysis, so you did not average over intensity and controllability of emotions, correct?

Response: The original statement may lead to ambiguous interpretations. In terms of data analysis, there is no averaging of the intensity and controllability of emotions. Athletes assess emotional events and intensity at a fixed time each day, which can lead to a subjective perception that has been averaged, rather than reflecting the real-time emotional experiences and strategic choices during competitions. To clarify this point, we have revised the statement "However, athletes' retrospective assessment of emotional induction, intensity, and controllability is an evaluation of the overall situation over a short period, not the emotional intensity and controllability that occur in real-time during training and competitions. This also makes it difficult to examine the dynamic changes in athletes' emotional regulation strategies and situational demands over this period. This is an inherent limitation of survey research, which is the inability to record more detailed data more densely."

15. Please discuss the limitations in more detail. For instance, you relied solely on retrospective self-reported data. This requires athletes to a) remember the

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Decision Letter 1

Michael B Steinborn

28 Nov 2024

PONE-D-24-25633R1Effect of Emotional Regulation on Performance of Shooters during Competition: an Ecological Momentary  Assessment StudyPLOS ONE

Dear Dr. Hua,

Thank you for submitting your manuscript to PLOS ONE. After careful consideration, we feel that it has merit but does not fully meet PLOS ONE’s publication criteria as it currently stands. Therefore, we invite you to submit a revised version of the manuscript that addresses the points raised during the review process. Editor comments. The same reviewers have provided additional feedback on your manuscript. R1 and R2 are satisfied with the revisions and recommend acceptance, whereas R3 remains dissatisfied, raising significant concerns that they feel have not been adequately addressed. Consequently, R3 recommends rejection and does not support the manuscript in its current form. Given these conflicting recommendations, I must make a difficult decision. While I cannot accept the manuscript at this stage due to R3’s unresolved concerns, I believe that a further round of revision could potentially address or mitigate these issues. I am therefore inviting you to submit another revision of your manuscript. If you feel able to address the raised issues, please provide a detailed point-by-point response to all remaining comments from R3. Wherever feasible, incorporate additional analyses or clarifications. For issues that cannot be directly addressed, explicitly discuss and acknowledge these limitations. I hope this further opportunity enables you to resolve the outstanding issues and advance your manuscript, but see my detailed comments below.

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Michael B. Steinborn, PhD

Section Editor

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Additional Editor Comments:

In the following, I will provide (co-)comments on the raised issues and specific aspects of your work, offering feedback from the perspective of an interested reader who is not directly involved in your specific field of study. My comments are intended to support you in revising the manuscript. Given that some issues appear fundamentally unresolvable without new data collection or substantial reworking of the analysis, I aim to provide guidance on how these might be addressed in a way that strengthens the paper. The feedback focuses primarily on objectively identifiable issues rather than engaging in internal theoretical or methodological debates within the field. My intention is to assist in improving the manuscript, not to criticise your work.

(-1-) Origin of items.

R3 has raised concerns about discrepancies between the questionnaire items used in this study and the original validated scales. While modifications do not inherently invalidate an instrument, their appropriateness depends on item content and face validity. I recommend providing justification to ensure theoretical and psychometric soundness. To address this, it may be helpful to detail the origin of the chosen measures, the rationale for modifications, and any supporting theoretical or empirical evidence. If items were adapted to fit the context of this study (e.g., because brief measures were needed to avoid extending testing time unduly), you might explain how these changes align with the construct being measured. I further suggest acknowledging deviations from the original scales and discussing why alternative validated instruments were not used. If evidence, such as pilot testing, supports the validity of these items, I suggest referring to these literature sources, where such evidence is unavailable, however, acknowledging limitations and outlining strategies to mitigate them would enhance transparency. A clear summary of the modifications and their rationale is likely to address R3's concerns and improve methodological rigour.

(-2-) Use of Single-Item Measures.

Single-item measures, though often criticised, are not inherently invalid solely due to the absence of aggregation. From a measurement theory perspective, statistical aggregation typically enhances reliability. However, the validity and reliability of single-item measures depend heavily on their content. For instance, a single-item measure for a straightforward construct like body height in centimetres is likely reliable because individuals vary sufficiently to produce distinguishable values and because it is likely that they will report consistent results in test-retest scenarios (because persons typically know what their height is). This means, whether the choice of items can be justified likely depends on content validity, that is, of how well the items chosen represent the concept being measured. I am not an expert on the specific case at hand, but as a rule of thumb, some constructs are clear and self-evident, making single-item measures potentially justifiable. However, I agree with R3 that complex umbrella concepts, such as emotion regulation strategies, are relatively complicated to represent using single item scores. This is because these constructs encompass numerous dimensions and are not easily captured in a few items, and indeed, even multi-item scales may struggle to fully represent such constructs, as their definitions are context-dependent, thus can vary and encompass a wide range of aspects. Since (as it seems to me) collecting new data is likely not possible or feasible, I recommend more deeply analysing the content validity of the existing items (what do they mean, actually) to evaluate their appropriateness and effectiveness. Such an analysis could address R3’s concerns, at least a bit.

To best support you in the review process, I recommend consulting the abovementioned works, as their methodologies and discussions offer valuable insights relevant to R3’s concerns. While not directly addressing performance anxiety in shooters, they provide a range of specific guidance that is broadly relevant and potentially helpful across topics. This relevance is why I suggest referring to these studies. For instance, Deng et al. (2022) proposed a systematic seven-step plan for evaluating measurement accuracy, covering molecular to molar aspects. I believe this comprehensive approach could serve as a narrative model for elaborating on psychometric aspects of your measures, particularly pertaining to creating new subscales and the use of single-item measures (doi: 10.1016/j.actpsy.2022.103789; doi:10.3389/fpsyg.2022.946626). Implementing this framework may help address R3’s concerns about the psychometric soundness of your instruments. Steghaus and Poth (2024) offer an in-depth analysis of the significance of context and content validity in selecting items for state and trait measurements, directly addressing issues raised about item origin and single-item measures. Aligning your item selection and measurement strategies with their principles could strengthen the theoretical justification for your methods. Similarly, Kärtner et al. (2021) also theorises on the importance of context in measurement and the need for thorough validation when adapting instruments. While not directly related to emotion regulation in shooting competitions, their methodological rigour can inform your approach to justifying item modifications and creating new subscales. Drawing on their validation processes may help reinforce your methodological framework. Incorporating these studies’ methodologies and discussions into your manuscript can provide a solid foundation to address R3’s concerns, demonstrating rigorous measurement practices and clear justifications for your choices, thereby enhancing the validity and credibility of your findings.

Deng, Y. et al. (2022). The effect of mind wandering on cognitive flexibility is mediated by boredom. Acta Psychologica, 231, 103789. doi:10.1016/j.actpsy.2022.103789

Steghaus, S., & Poth, C. H. (2024). Feeling tired versus feeling relaxed: Two faces of low physiological arousal. PLoS One, 19(9), e0310034. doi:10.1371/journal.pone.0310034

Kärtner, L. et al. (2021). Positive expectations predict improved mental-health outcomes linked to psychedelic microdosing. Scientific Reports(1941). doi:10.1038/s41598-021-81446-7

(-3-) Creation of New Subscales

The reviewer raises concerns about the creation of new subscales by combining selected items, emphasising that this approach requires a clear theoretical rationale and psychometric re-validation, which they feel has not been adequately addressed. Their point suggests that items may not reliably measure the intended construct when removed from their original context, as the contextual embedding could influence their meaning. While I cannot be certain of the extent to which this applies in the current study, I recommend that you carefully consider and provide evidence or reasoning to demonstrate that the selected items appropriately measure the intended constructs. For example, a detailed theoretical justification for the combination of items could strengthen the argument for the new subscales, even if re-validation is not feasible. Additionally, clarifying potentially vague items (e.g., emotional intensity) and discussing the limitations of single-item measures explicitly within the manuscript could improve transparency. Providing references to support the decision to use single-item measures in cases where multi-item scales are not practical may also help address this concern. If possible, supplementary analyses or validations could further enhance the reliability of the measures used.

(-4-) Statistical Issues.

There is one issue that R3 raised, which concerns the inclusion of the time factor as a key variable in the multilevel model, suggesting that its omission undermines the longitudinal nature of the data. R3 also recommend presenting all terms in the model, including main effects and interaction effects, rather than focusing solely on interactions. To be honest, I cannot fully assess this issue myself, given that I am not the ultimate expert here, and also as R1 and R2 found the modelling satisfactory and even commended it. However, R3 has provided arguments that seem also plausible to me, and given his expertise in this area, I am inclined to trust his judgment. Therefore, I would tentatively suggest that you carefully consider how the time factor might be incorporated into the model, if feasible. If it is not possible or does not make sense (in your opinion) to include this variable, then providing a clear justification for its exclusion would be good. In any case, acknowledging any limitations and explicitly discussing why certain recommendations cannot be implemented could also help to address R3’s concerns effectively.

[Note: HTML markup is below. Please do not edit.]

Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

1. If the authors have adequately addressed your comments raised in a previous round of review and you feel that this manuscript is now acceptable for publication, you may indicate that here to bypass the “Comments to the Author” section, enter your conflict of interest statement in the “Confidential to Editor” section, and submit your "Accept" recommendation.

Reviewer #1: All comments have been addressed

Reviewer #2: All comments have been addressed

Reviewer #3: (No Response)

**********

2. Is the manuscript technically sound, and do the data support the conclusions?

The manuscript must describe a technically sound piece of scientific research with data that supports the conclusions. Experiments must have been conducted rigorously, with appropriate controls, replication, and sample sizes. The conclusions must be drawn appropriately based on the data presented.

Reviewer #1: Yes

Reviewer #2: Yes

Reviewer #3: No

**********

3. Has the statistical analysis been performed appropriately and rigorously?

Reviewer #1: Yes

Reviewer #2: Yes

Reviewer #3: No

**********

4. Have the authors made all data underlying the findings in their manuscript fully available?

The PLOS Data policy requires authors to make all data underlying the findings described in their manuscript fully available without restriction, with rare exception (please refer to the Data Availability Statement in the manuscript PDF file). The data should be provided as part of the manuscript or its supporting information, or deposited to a public repository. For example, in addition to summary statistics, the data points behind means, medians and variance measures should be available. If there are restrictions on publicly sharing data—e.g. participant privacy or use of data from a third party—those must be specified.

Reviewer #1: No

Reviewer #2: Yes

Reviewer #3: No

**********

5. Is the manuscript presented in an intelligible fashion and written in standard English?

PLOS ONE does not copyedit accepted manuscripts, so the language in submitted articles must be clear, correct, and unambiguous. Any typographical or grammatical errors should be corrected at revision, so please note any specific errors here.

Reviewer #1: (No Response)

Reviewer #2: Yes

Reviewer #3: Yes

**********

6. Review Comments to the Author

Please use the space provided to explain your answers to the questions above. You may also include additional comments for the author, including concerns about dual publication, research ethics, or publication ethics. (Please upload your review as an attachment if it exceeds 20,000 characters)

Reviewer #1: Thank you very much for your thorough response to my comments. I believe the manuscript has improved considerably and is now ready for acceptance. However, I was unable to access the data via the provided URL. Please ensure that the data is accessible.

Reviewer #2: The manuscript demonstrates a high level of scholarly contribution and is well-prepared for publication. The authors have meticulously addressed all necessary concerns raised, providing comprehensive explanations and ensuring that the content meets the expected standards of rigor and clarity.

Reviewer #3: Unfortunately, the authors did not sufficiently address my main comments. No validity and reliability measures were presented for the questions used to assess emotion regulation strategies. Nor was a psychometric analysis presented for the distinction between engagement strategies and disengagement strategies.

**********

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Reviewer #1: Yes:  Julian Gutzeit

Reviewer #2: No

Reviewer #3: No

**********

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PLoS One. 2025 Mar 25;20(3):e0318872. doi: 10.1371/journal.pone.0318872.r005

Author response to Decision Letter 2


7 Jan 2025

Thank you very much for the valuable suggestions you have offered regarding this article. I greatly appreciate the detailed and constructive feedback you have provided to improve the manuscript, and I fully agree with your recommendations. Below, I will explain the revisions made in response to the following four aspects one by one.

(-1-) Origin of items.

R3 has raised concerns about discrepancies between the questionnaire items used in this study and the original validated scales. While modifications do not inherently invalidate an instrument, their appropriateness depends on item content and face validity. I recommend providing justification to ensure theoretical and psychometric soundness. To address this, it may be helpful to detail the origin of the chosen measures, the rationale for modifications, and any supporting theoretical or empirical evidence. If items were adapted to fit the context of this study (e.g., because brief measures were needed to avoid extending testing time unduly), you might explain how these changes align with the construct being measured. I further suggest acknowledging deviations from the original scales and discussing why alternative validated instruments were not used. If evidence, such as pilot testing, supports the validity of these items, I suggest referring to these literature sources, where such evidence is unavailable, however, acknowledging limitations and outlining strategies to mitigate them would enhance transparency. A clear summary of the modifications and their rationale is likely to address R3's concerns and improve methodological rigour.

Response: We are deeply appreciative of the valuable feedback provided by the editor and reviewers. In the literature review section, we have meticulously reorganized the classification of emotion regulation strategies and the research methods pertaining to emotional regulation flexibility. We have further clarified the theoretical and empirical basis for our measurement approach. We have also provided a detailed explanation of the relationship and changes between the current measurement items and the original scales. In the discussion and limitations sections, we have added an explanation regarding the insufficiencies of the measurement items and tools selected for this study, and we have suggested areas for improvement in future research.

(-2-) Use of Single-Item Measures.

Single-item measures, though often criticised, are not inherently invalid solely due to the absence of aggregation. From a measurement theory perspective, statistical aggregation typically enhances reliability. However, the validity and reliability of single-item measures depend heavily on their content. For instance, a single-item measure for a straightforward construct like body height in centimetres is likely reliable because individuals vary sufficiently to produce distinguishable values and because it is likely that they will report consistent results in test-retest scenarios (because persons typically know what their height is). This means, whether the choice of items can be justified likely depends on content validity, that is, of how well the items chosen represent the concept being measured. I am not an expert on the specific case at hand, but as a rule of thumb, some constructs are clear and self-evident, making single-item measures potentially justifiable. However, I agree with R3 that complex umbrella concepts, such as emotion regulation strategies, are relatively complicated to represent using single item scores. This is because these constructs encompass numerous dimensions and are not easily captured in a few items, and indeed, even multi-item scales may struggle to fully represent such constructs, as their definitions are context-dependent, thus can vary and encompass a wide range of aspects. Since (as it seems to me) collecting new data is likely not possible or feasible, I recommend more deeply analysing the content validity of the existing items (what do they mean, actually) to evaluate their appropriateness and effectiveness. Such an analysis could address R3’s concerns, at least a bit.

To best support you in the review process, I recommend consulting the abovementioned works, as their methodologies and discussions offer valuable insights relevant to R3’s concerns. While not directly addressing performance anxiety in shooters, they provide a range of specific guidance that is broadly relevant and potentially helpful across topics. This relevance is why I suggest referring to these studies. For instance, Deng et al. (2022) proposed a systematic seven-step plan for evaluating measurement accuracy, covering molecular to molar aspects. I believe this comprehensive approach could serve as a narrative model for elaborating on psychometric aspects of your measures, particularly pertaining to creating new subscales and the use of single-item measures (doi: 10.1016/j.actpsy.2022.103789; doi:10.3389/fpsyg.2022.946626). Implementing this framework may help address R3’s concerns about the psychometric soundness of your instruments. Steghaus and Poth (2024) offer an in-depth analysis of the significance of context and content validity in selecting items for state and trait measurements, directly addressing issues raised about item origin and single-item measures. Aligning your item selection and measurement strategies with their principles could strengthen the theoretical justification for your methods. Similarly, Kärtner et al. (2021) also theorises on the importance of context in measurement and the need for thorough validation when adapting instruments. While not directly related to emotion regulation in shooting competitions, their methodological rigour can inform your approach to justifying item modifications and creating new subscales. Drawing on their validation processes may help reinforce your methodological framework. Incorporating these studies’ methodologies and discussions into your manuscript can provide a solid foundation to address R3’s concerns, demonstrating rigorous measurement practices and clear justifications for your choices, thereby enhancing the validity and credibility of your findings.

Response: We are grateful to the editor and reviewers for their valuable suggestions to improve this manuscript. Special thanks to the editor for the constructive feedback provided for further enhancement. We have revisited the literature and organized the measurement of the psychological variable of emotion regulation, seeking new measurement rationales to substantiate the validity of the measurement tools employed in this study.

Emotion regulation possesses distinct characteristics, differing from previous examinations of the relationship between emotional regulation tendencies (strategy use preferences) and environmental adaptation. This study focuses on investigating whether emotional regulation flexibility promotes athletic performance. Conventional emotion regulation measurement tools can only measure individuals' preferences for emotion regulation strategies and cannot reflect the potential for individuals to use a variety of different strategies based on situational changes. Emotional regulation tendencies and emotional regulation flexibility are two different features of emotion regulation, with significant conceptual differences. Original measurement tools tend to measure individuals' preferences for using strategies in relatively stable situations. Although the core characteristics of strategies themselves are stable (e.g., reappraisal strategies involve changing thoughts), the regulatory context varies greatly and is dynamically changing. Therefore, examining individuals' strategy use in response to situational changes is an investigation of short-term psychological changes. When assessing short-term psychological changes such as relaxation, the corresponding measurement tools should focus on the variability of context and content (Stegaus & Poth, 2024; Kärtner et al., 2021). According to previous research, tools and items measuring short-term psychological changes should possess sensitivity (to capture state changes), contextuality (to consider the variability of measurement background or context), and individual variability (to adapt measurement items to different individuals).

Based on the capability model of emotion regulation, the core characteristics of the six regulatory strategies are relatively stable. Cognitive reappraisal is fundamentally characterized by "changing thoughts," expressive suppression is primarily manifested as "inhibiting emotional experiences" (Gross & John, 2003), and acceptance is merely noticing without judgment (Baer et al., 2004). Problem solving refers to finding specific methods to deal with current emotions (D’Zurilla & Nezu, 1990). Rumination is characterized by repetitive or immersive experiencing or thinking about certain emotions (Treynor et al., 2003). Avoidance encompasses multiple strategies to escape, control, or suppress unwanted thoughts, emotions, and sensations (Kashdan et al., 2013).

(-3-) Creation of New Subscales

The reviewer raises concerns about the creation of new subscales by combining selected items, emphasising that this approach requires a clear theoretical rationale and psychometric re-validation, which they feel has not been adequately addressed. Their point suggests that items may not reliably measure the intended construct when removed from their original context, as the contextual embedding could influence their meaning. While I cannot be certain of the extent to which this applies in the current study, I recommend that you carefully consider and provide evidence or reasoning to demonstrate that the selected items appropriately measure the intended constructs. For example, a detailed theoretical justification for the combination of items could strengthen the argument for the new subscales, even if re-validation is not feasible. Additionally, clarifying potentially vague items (e.g., emotional intensity) and discussing the limitations of single-item measures explicitly within the manuscript could improve transparency. Providing references to support the decision to use single-item measures in cases where multi-item scales are not practical may also help address this concern. If possible, supplementary analyses or validations could further enhance the reliability of the measures used.

Response: In the literature review section, we have added theoretical underpinnings regarding the measurement of the emotion regulation process. Recently, longitudinal tracking of individuals' dynamic changes in emotion regulation has gradually become an important trend in emotion regulation research. This study focuses on examining the characteristic of emotional regulation flexibility. The core of emotional regulation flexibility lies in the flexible selection and use of regulatory strategies in response to situational changes, whereas traditional emotion regulation measurement tools primarily examine habitual use of emotion regulation strategies without considering situational changes. The essence of the concept of emotional regulation flexibility is to flexibly alter emotion regulation strategies according to the demands of emotion regulation (situational changes). The rules governing the use of emotion regulation strategies themselves do not change with the context, such as cognitive reappraisal, which requires individuals to change their thoughts and interpretations of different eliciting situations. Based on this, the examination of emotional regulation flexibility in this study is grounded in the variability of situational changes and the selection of regulatory strategy use rules that have been widely validated in previous research, to explore the dynamic changes in athletes' emotion regulation processes. In the limitations section of the article, we have added corresponding explanations: Examining the variability of emotion regulation strategies with situational changes, using subjective assessment methods to examine elicited emotions (emotional intensity) is not clear and may be biased; future studies should adopt a combination of subjective and objective methods (such as heart rate, electromyography, and other physiological measurements) to enhance the reliability of the research.

(-4-) Statistical Issues.

There is one issue that R3 raised, which concerns the inclusion of the time factor as a key variable in the multilevel model, suggesting that its omission undermines the longitudinal nature of the data. R3 also recommend presenting all terms in the model, including main effects and interaction effects, rather than focusing solely on interactions. To be honest, I cannot fully assess this issue myself, given that I am not the ultimate expert here, and also as R1 and R2 found the modelling satisfactory and even commended it. However, R3 has provided arguments that seem also plausible to me, and given his expertise in this area, I am inclined to trust his judgment. Therefore, I would tentatively suggest that you carefully consider how the time factor might be incorporated into the model, if feasible. If it is not possible or does not make sense (in your opinion) to include this variable, then providing a clear justification for its exclusion would be good. In any case, acknowledging any limitations and explicitly discussing why certain recommendations cannot be implemented could also help to address R3’s concerns effectively.

Response:We are deeply grateful for reviewers’s meticulous examination of our manuscript and the valuable feedback you have provided. We have carefully considered all your suggestions and have made the necessary revisions. In the previous round of revisions, we have reworked our data analysis methods. R version 3.6.1 was employed to conduct Multi-level Linear Model analysis. A two-tiered model was established with the dependent variables being the average shooting score and the proportion of perfect tens. Time-level (Level 1) linear mixed-effects models were performed using the lme4 package. Following your expert advice, we have incorporated the time factor into our model. We have highlighted the changes in the text using different shades of yellow as suggested. In this analysis, the time factor was included at the Day-level in the first tier of the model, focusing on examining the dynamic relationship between athletes' emotional regulation flexibility and athletic performance.

Decision Letter 2

Michael B Steinborn

23 Jan 2025

Effect of Emotional Regulation on Performance of Shooters during Competition: an Ecological Momentary  Assessment Study

PONE-D-24-25633R2

Dear Dr. Hua,

We’re pleased to inform you that your manuscript has been judged scientifically suitable for publication and will be formally accepted for publication once it meets all outstanding technical requirements.

Final editor comment.

The authors have thoroughly addressed all comments and significantly improved the manuscript, which is now well-elaborated and in excellent shape. While the fundamental critiques raised by R3 remain partially unresolved, addressing them would require new data collection. However, it remains unclear what specific additional data would sufficiently resolve these concerns, leaving the matter open to interpretation. Within these constraints, the authors have made every effort to address the concerns as comprehensively as possible. After careful consideration, I conclude that the manuscript is now ready for publication in its present form.

Within one week, you’ll receive an e-mail detailing the required amendments. When these have been addressed, you’ll receive a formal acceptance letter and your manuscript will be scheduled for publication.

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Kind regards,

Michael B. Steinborn, PhD

Section Editor

PLOS ONE

Additional Editor Comments (optional):

Reviewers' comments:

Acceptance letter

Michael B Steinborn

PONE-D-24-25633R2

PLOS ONE

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Associated Data

    This section collects any data citations, data availability statements, or supplementary materials included in this article.

    Supplementary Materials

    S1 Data. Research data set.

    (CSV)

    pone.0318872.s001.csv (62.9KB, csv)
    S2 Data. An introduction to the naming of variables in the study.

    (CSV)

    pone.0318872.s002.csv (395B, csv)
    Attachment

    Submitted filename: Response to Reviewers.doc

    pone.0318872.s003.doc (100KB, doc)

    Data Availability Statement

    The dataset for this study is available on Github, and the direct link to freely access the data set is https://github.com/ZhouLulu-cloud/Effect-of-Emotional-Regulation-on-Performance-of-Shooters-during-Competition.git.


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