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. Author manuscript; available in PMC: 2021 Jun 29.
Published in final edited form as: Clin Psychol Sci. 2021 Mar 19;9(3):449–466. doi: 10.1177/2167702620974368

Emotional and Cognitive Empathy in Caregivers of Persons with Neurodegenerative Disease: Relationships with Caregiver Mental Health

Alice Y Hua 1, Jenna L Wells 1, Casey L Brown 1, Robert W Levenson 1
PMCID: PMC8240761  NIHMSID: NIHMS1642048  PMID: 34194871

Abstract

Caregiving for a person with dementia or neurodegenerative disease (PWD) is associated with increased rates of depression and anxiety. As the population ages and dementia prevalence increases worldwide, mental health problems related to dementia caregiving will become an even more pressing public health concern. The present study assessed emotional empathy (physiological, behavioral, and self-reported emotional responses to a film depicting others suffering) and two measures of cognitive empathy (identifying the primary emotion experienced by another person; providing continuous ratings of the valence of another person’s changing emotions) in relation to mental health (standard questionnaires) in 78 caregivers of PWDs. Greater emotional empathy (self-reported emotional responses) was associated with worse mental health, even after accounting for known risk factors. Neither measure of cognitive empathy was associated with mental health. A relationship between high levels of emotional empathy and poor mental health in caregivers suggests possible risk indicators and intervention targets.

Keywords: depression, anxiety, mental health, caregiving, emotional empathy, cognitive empathy, dementia, neurodegenerative disease


Older adults generally have lower levels of mental health problems, such as depression and anxiety, compared to younger adults (Fiske, Wetherell, & Gatz, 2009; Schuurmans & van Balkom, 2011). One exception to this pattern is found in individuals providing care for a person with dementia or neurodegenerative disease (PWD). Familial caregivers of PWDs manifest up to four-fold increases in rates of depression and three-fold increases in seeking treatment for anxiety compared to same-aged non-caregiving adults (Brodaty & Donkin, 2009; Coope et al., 1995; Cuijpers, 2005; Kolanowski, Fick, Waller, & Shea, 2004). With the worldwide “graying” of the population (by 2050 11.4% of the U.S. population will be over 75; Kawas & Brookmeyer, 2001) and the increasing prevalence of dementia with age (44% of individuals between the ages of 75-84 have Alzheimer’s disease, the most common form of dementia; Herbert, Weuve, Scherr, & Evans, 2013), mental health problems associated with caregiving will be a growing major public health issue with increasing implications for clinical psychology.

Although familial PWD caregivers as a group are highly vulnerable to declining mental health, individual caregivers differ considerably. Whereas some find caregiving to be a highly rewarding experience, including feeling enhanced spirituality and a greater sense of fulfillment and purpose (Abdollahpour, Nedjat, & Salimi, 2018), others struggle with the increased burden and strain of caregiving, including being exposed to the suffering of a loved one (Monin & Schulz, 2009; Richardson, Lee, Berg-Weger, & Grossberg, 2013). This variation among caregivers underscores the importance of identifying factors that are associated with declining mental health in caregivers. Such factors can help identify caregivers who are at heightened risk for developing mental health problems and suggest potential intervention targets to prevent new mental health problems and reduce the severity of existing ones.

Vulnerabilities to poor mental health in caregivers

Studies on individual differences in the negative effects of familial caregiving have identified specific characteristics of the PWD. An emerging consensus suggests that greater severity of PWDs’ behavioral and psychological symptoms (including emotion-related behaviors such as agitation and apathy) are worse for caregiver health than cognitive (e.g., memory loss) or functional (e.g., loss of mobility) symptoms (Ornstein & Gaugler, 2012; Schulz, O’Brien, Bookwala, & Fleissner, 1995). In our research, for example, we have found that declines in PWDs’ emotional functioning, including reduced empathy (Brown et al., 2018; Brown et al., 2020), altered emotional reactivity (Chen et al., 2017; Lwi et al., 2018), and diminished emotion regulation (Otero & Levenson, 2017), are associated with poorer caregiver health and well-being. Together, these findings suggest that declining emotional functioning in PWDs is an important risk factor for poor mental health outcomes in caregivers.

In addition to these risk factors associated with the PWD, a number of demographic, financial, and social variables have also been linked to poor health in familial caregivers. Meta-analyses suggest that being the spouse of a PWD, a woman (i.e., experiencing sexism), of a systemically oppressed race (i.e., experiencing racism), low in socioeconomic status, and more socially isolated are all associated with negative outcomes in caregivers (Brodaty & Donkin, 2009; Schulz et al., 1995; Young et al., 2020).

Many studies have robustly characterized the negative psychological effects of caregiving by healthcare providers and family members of PWDs (e.g., Kokkonen, Cheston, Dallos, & Smart, 2014; Schulz, Beach, Czaja, Martire, & Monin, 2020) and characterized familial caregivers’ emotion-related experiences during caregiving (e.g., compassion fatigue, coping strategies to reduce stress; Day & Anderson, 2011; van Knippenberg, de Vugt, Ponds, Verhey, & Myin-Germeys, 2018). However, familial caregivers’ emotional experiences or emotional functioning (which we conceptualize as emotional reactivity, emotion regulation, and empathy; Levenson et al., 2008) have largely not been investigated as a basis for predicting adverse caregiver mental health outcomes. Because of the importance of one’s own emotional functioning in relation to their mental health (Gross, Uusberg, & Uusberg, 2019), we sought to examine this relationship in familial caregivers.

Studies that have examined the relationship between caregiver emotional functioning and their mental health suggest that negative emotional reactivity and poor emotion regulation relate to negative caregiver outcomes. For example, caregiver propensity to experience negative emotions or a negative attitude toward caregiving relates to worse psychological outcomes (Safavi, Berry, & Wearden, 2017; Shim, Barroso, & Davis, 2012). We have found that caregivers who have the short-short variant in the serotonin transporter gene, which is thought to be related to greater emotional reactivity (Belsky & Pluess, 2009; Gyurak et al., 2013; Haase et al., 2015), show a relationship between low empathy in the PWD and low psychological well-being in the caregiver, whereas others who do not have this variant do not show such an association (Wells et al., 2019). Moreover, work from our laboratory has shown that poor emotion regulation ability in caregivers relates to their having higher levels of anxiety (Wells, Hua, & Levenson, 2020). In the present study we focused on empathy, because despite the strong evidence for the important role that low empathy in the PWD plays in poor caregiver mental health (Brown et al., 2018; Hsieh, Irish, Daveson, Hodges, & Piguet, 2013), empathy in the familial caregiver in relation to their own mental health has not been well studied.

Empathy as a risk factor for poor caregiver mental health

The ability to know, feel, and respond appropriately to what others are feeling (Levenson & Ruef, 1992) is often referred to as empathy. Empathy can be broken down into emotional and cognitive facets. Emotional empathy refers to the ability to feel or share others’ emotional states, whereas cognitive empathy refers to the ability to know or understand another person’s emotions (Decety & Jackson, 2006; Preston & de Waal, 2002; Singer & Lamm, 2009; Zaki, Weber, Bolger, & Ochsner, 2009).

Emotional and cognitive empathy are both beneficial in many contexts (Morelli, Ong, Makati, Jackson, & Zaki, 2017; Wei, Liao, Ku, & Shaffer, 2011). However, in the context of providing care for a loved one undergoing a distressing life experience, these facets of empathy may have quite different relationships with caregiver mental health (Lee, Brennan, & Daly, 2001). When PWDs experience distress, a caregiver with high emotional empathy may feel or share the PWD’s distress, which can lead to the caregiver being overwhelmed by their own sense of distress, making high emotional empathy problematic for caregivers by increasing their distress vicariously. In contrast, a caregiver with high cognitive empathy may accurately know or understand that the PWD has a higher need for care, which can lead to more effective ways of helping the PWD and to reduced burden for caregivers.

In line with these ideas, professional healthcare providers with greater emotional empathy are especially prone to share others’ distress. When exposed to high levels of negative emotions in stressful environments, providers can develop empathy burnout and emotional exhaustion (Decety & Fotopoulou, 2014; Figley, 2011). On the other hand, greater cognitive empathy (operationalized as perspective taking or understanding others’ emotions using trait empathy measures, such as the Interpersonal Reactivity Index or Jefferson Scale of Empathy; Davis, 1983; Hojat et al., 2001) in professional healthcare providers (e.g., physicians, nurses) has been associated with beneficial patient outcomes (patient satisfaction, control of hemoglobin A1c in diabetic patients; Blatt, LeLacheur, Galinsky, Simmens, & Greenberg, 2010; Hojat et al., 2011) and provider outcomes (compassion satisfaction; Gleichgerrcht & Decety, 2013). Interestingly, these tensions between different kinds of empathy are also found in early psychotherapy theory and research (Rogers, 1951, 1957), where effective psychotherapists were thought to be able to understand client’s emotional states accurately without becoming enmeshed and emotionally over-involved.

Despite these provocative insights from previous work, researchers have rarely examined familial caregivers’ emotional and cognitive empathy in relation to their own mental health. One study found that higher emotional empathy in caregivers was associated with lower life satisfaction, whereas higher cognitive empathy was associated with greater life satisfaction (Lee et al., 2001). In another study (Jütten, Mark, & Sitskoorn, 2019), higher emotional empathy in caregivers was associated with greater anxiety and cognitive empathy was associated with depression in a curvilinear fashion, such that highest levels of cognitive empathy predicted the lowest levels of depression.

In these two prior studies of the relationship between caregiver empathy and mental health, empathy was measured using self-report inventories, which can be susceptible to several forms of bias (Levenson & Ruef, 1992; Murphy & Lilienfeld, 2019). To our knowledge, no prior studies of caregiver empathy and mental health have used laboratory-based measures of caregiver empathy. Laboratory assessments of emotional empathy typically measure participant responses (physiology, behavior, self-reported emotional experience) to viewing others who are experiencing powerful negative emotions, such as emotional pain or distress (Hein & Singer, 2008; Lamm, Decety, & Singer, 2011; Marsh, 2018). Laboratory assessments of cognitive empathy typically ask participants label or track others’ emotions, with accuracy judged against an external criterion, such as ratings by the target person or a panel of experts (Goodkind et al., 2012; Ickes, 1997; Levenson & Ruef, 1992; Ruef & Levenson, 2007; Zaki et al., 2009). While these laboratory assessments use forms of self-report responses (e.g., ratings of emotional experience in response to viewing others suffering or reporting on what they think someone else feels), these self-report empathy measures capture a more immediate feeling or understanding of others’ emotional states. Such responses may be less susceptible to variation in metacognitive insight about empathic abilities compared to traditional trait empathy measures (Murphy & Lilienfeld, 2019). Furthermore, because heightened negative emotional reactivity has been independently associated with poor caregiver mental health (Safavi et al., 2017) and greater emotional reactivity may help individuals feel or understand others’ emotional states (Rueckert, Branch, & Doan, 2011), accounting for the potential influence of caregivers’ emotional reactivity to a negative or aversive stimulus will help determine if findings are specific to empathy. Applying these approaches could greatly increase our understanding of the role that caregiver empathy plays in accounting for individual differences in caregiver mental health.

The Present Study

The present study aimed to understand the relationships between laboratory-based measures of caregiver emotional and cognitive empathy and caregiver mental health measured using standard questionnaires. We measured caregivers’ general ability to feel or share others’ emotion states (emotional empathy) and to know or understand others’ emotional states (cognitive empathy). Emotional empathy was assessed by measuring physiological, behavioral, and self-reported emotional responses to a film depicting others suffering. Cognitive empathy was assessed both by having participants identify the primary emotion experienced by a target character in a film and by having them provide continuous ratings of the valence of a person’s changing emotions. To control for individual differences in emotional reactivity, we measured caregivers’ self-reported emotional response to an aversive emotional stimulus (a sudden, unexpected loud noise) and used it as a covariate in our analyses. By examining laboratory measures of emotional and cognitive empathy in relation to caregiver mental health, our study has the potential to further caregiving research by identifying a specific aspect of caregiver emotional functioning that may place caregivers at greater risk for developing poor mental health.

Our primary hypothesis was that greater emotional empathy in caregivers would be associated with worse caregiver mental health. We reasoned that caregivers with greater emotional responses to the suffering of others in our laboratory task would also have greater emotional responses to the declines and suffering of the PWD in their care. We reasoned that greater sensitivity to the suffering of others, combined with the other stressors and burdens involved in caregiving, would create a fertile breeding ground for symptoms of anxiety and depression. Because cognitive empathy does not engender this kind of additional suffering, we did not expect greater cognitive empathy in our laboratory tasks to be related to worse caregiver mental health.

We did not have a priori hypotheses as to which aspect of emotional empathy would be most strongly associated with caregiver mental health. Because we conceptualize emotional responses as having physiological, behavioral, and self-report components (Levenson et al., 2008), and laboratory measures of emotional empathy have not yet been examined in relation to caregiver mental health, we wanted to determine which aspect of emotional empathy would be most strongly related to caregiver mental health.

Materials and Methods

Participants

Seventy-eight PWDs and their familial or close caregivers participated in a study of emotional functioning at the Berkeley Psychophysiology Laboratory at the University of California, Berkeley (UCB). Participants were recruited at the Memory and Aging Center at the University of California, San Francisco (UCSF), where PWDs underwent a full diagnostic evaluation, including neurological, neuropsychological, and neuroimaging assessment. At the UCSF assessment, caregivers were told about the Berkeley study, and, if they expressed interest, were subsequently contacted to schedule a laboratory session. All participants, or their legal guardians when appropriate, provided consent for their participation. All procedures for obtaining consent and all study procedures were approved by the Committee for the Protection of Human Subjects at UCB.

Caregivers were 64.5 years old on average, predominantly spouses of PWDs seen at UCSF (92.3%), women (60.3%), White (83.3%), and highly educated (71.7% with at least 16 years of education). At UCSF, PWDs were diagnosed according to consensus criteria (Armstrong et al., 2013; Budka et al., 1995; Gorno-Tempini et al., 2011; Klockgether, 2010; Litvan et al., 1996; McKeith, 2004; McKhann et al., 2011; Rascovsky et al., 2011). The sample of 78 PWDs included: (a) 33 with frontotemporal dementia (FTD), which includes three clinical syndromes that affect socioemotional and language functioning (16 behavioral variant FTD, 9 non-fluent variant primary progressive aphasia, 8 semantic variant primary progressive aphasia); (b) 11 with Alzheimer’s disease (AD), which predominantly affects memory functioning; (c) 25 with diagnoses that were characterized by motor symptoms (Motor), including 9 with corticobasal syndrome, 2 with dementia with Lewy body disease, 1 with Parkinson’s disease, 1 with prion disease, 11 with progressive supranuclear palsy, and 1 with spinocerebellar ataxia; and (d) 9 at risk for developing dementia, including 5 with mild cognitive impairment (MCI) and 4 relatives of a person with FTD. For more details on caregiver and PWD demographics, see Table 1.

Table 1. Sociodemographic characteristics and clinical variables.

Means and standard deviations provided, unless otherwise noted.

PWDs Caregivers

N = 78 78
Age 62.60 (8.69) 64.52 (9.26)
Gender (% Women) 43.3 60.3
Race (n=)
Native American/Alaska Native 2 0
East or Southeast Asian/Asian American 4 5
Black/African American/Afro-Caribbean 1 1
Latinx/Chicanx/Hispanic 4 3
Multi-racial 3 4
Native Hawaiian/Pacific Islander 1 0
White 63 65
Education (n=)
High School - 7
2-Year College - 15
4-Year College - 29
Master’s Degree - 15
PhD, MD, or other professional degree - 12
Relationship to the PWD (% Spouse) - 92.3
Caregiver severity of anxiety symptoms (BAI) - 7.06 (7.60)
Caregiver severity of depression symptoms (CESD) - 12.12 (9.24)
PWD Diagnosis (n=)
FTD 33 -
AD 11 -
Motor 25 -
MCI or family member of person with FTD 9 -
PWD disease severity (CDR) 3.96 (2.71) -
PWD cognitive functioning (MMSE) 24.82 (4.81) -

PWD = person with neurodegenerative disease or dementia; FTD = frontotemporal dementia; AD = Alzheimer’s disease; Motor = diseases that primarily impact motor functioning; MCI = mild cognitive impairment

Procedure

Upon arrival at UCB, all participants (PWDs and caregivers) reviewed the procedures for the day and completed the consent forms. PWDs and caregivers were then seated in separate rooms and non-invasive physiological sensors (see more details below) were attached to participants to monitor their physiological responses. Participants sat in a chair facing a 21-inch color monitor. Video recordings of participants’ heads and torsos were obtained using a remote-controlled camera that was partially hidden from view. Participants completed a daylong laboratory session designed to provide a comprehensive assessment of multiple aspects of emotional functioning, including emotion recognition, emotional reactivity, and emotion regulation (Levenson et al., 2008).

The present study focused on caregiver data from four specific tasks (described below), including assessments of cognitive empathy (two tasks), emotional empathy, and emotional reactivity.

Apparatus and measures

Rating dial.

The rating dial (Ruef & Levenson, 2007) consisted of a small metal box with a knob and attached pointer that rotated through a 180° semi-circle. The semi-circle was divided into 9 equal divisions labelled with descriptors of very bad (shown with a schematic frowning face) at the far left, neutral (shown with a schematic neutral face) in the middle, and very good (shown with a schematic smiling face) at the far right. The dial generated a voltage that reflected the dial position; a computer sampled the voltage every 3 milliseconds and calculated the average dial position every second. The rating dial was located near the participant’s dominant hand.

Physiology.

In line with psychophysiology standard practices (Mendes, 2009), physiological measures were monitored continuously in order to capture reactivity (e.g., differences in physiological activity during resting baseline periods and trial periods) for various tasks. We used a system consisting of Biopac amplifier modules, a computer with analog-to-digital capability, and an online data acquisition and analysis software package (written by Robert W. Levenson). The program computed second-by-second averages for the following measures: (a) heart rate—inter-beat interval was the time interval in milliseconds between successive R waves, using Beckman miniature electrodes with Redux paste that were placed on opposite sides of the participants’ chest; (b) finger pulse amplitude—a UFI photoplethysmograph recorded the amplitude of blood volume in the finger using a photocell taped to the distal phalanx of the index finger of the nondominant hand; (c) finger pulse transmission time—the time interval in milliseconds was calculated between the R wave of the electrocardiogram and the upstroke of the peripheral pulse at the finger site, recorded from the distal phalanx of the index finger of the nondominant hand; (d) ear pulse transmission time—a UFI photoplethysmograph recorded the volume of blood in the ear to measure transmission time between the R waves of the electrocardiogram signal and the upstroke of pulse at the ear; (e) systolic blood pressure and (f) diastolic blood pressure—a cuff placed on the ring finger of the participant’s nondominant hand calculated blood pressure on every heartbeat using an Ohmeda Finapress 2300; (g) skin conductance level—the electrical conductance of the skin was computed using a constant voltage device to pass voltage between Beckman regular electrodes on the ring and index fingers of the nondominant hand to calculate the sweat response; (h) somatic activity—the amount of overall movement was computed using an electromechanical transducer attached to the platform of the participant’s chair; (i) respiration rate—the inter-cycle interval was the time interval in milliseconds between breaths calculated using a pneumatic bellows stretched around the thoracic region.

These nine measures were selected to sample the major autonomic (cardiovascular, electrodermal, respiratory) and somatic systems associated with emotional responding. For each measure, the average of the resting baseline period was subtracted from the average obtained during the task period to create a difference score for physiological reactivity (length of baseline and task period detailed below). Averages for each physiological reactivity score were normalized, reverse scored if necessary (so that larger values reflected greater physiological arousal), and then averaged. The use of this kind of composite measure, which helps control for Type I error, has been described in detail in several of our other publications (Sturm, Rosen, Allison, Miller, & Levenson, 2006; Verstaen et al., 2016).

Facial Behavior.

Trained coders rated recordings of participants’ facial behavior using the Emotional Expressive Behavior coding system (Gross & Levenson, 1993). Facial behavior was coded second by second for nine emotional facial behaviors (anger, disgust, happiness/amusement, contempt, sadness, embarrassment, fear, surprise, and confusion) on an intensity scale ranging from 0-3.

Laboratory Tasks

Cognitive empathy: Emotion Recognition Task.

Participants watched a series of 11 film clips that were developed to assess ability to recognize specific emotions (Goodkind et al., 2015). Each film clip (approximately 35 seconds in length) showed a character experiencing a positive (affection, amusement, calmness, enthusiasm), negative (anger, disgust, fear, sadness), or self-conscious emotion (embarrassment, pride, shame) and was preceded by a 30 second baseline period during which an “X” was displayed on the monitor. After watching each film clip, participants were shown a picture of the target character displaying a neutral expression and were asked to identify the emotion the target character felt most strongly from a list of the 11 emotions.

Accuracy on this task was calculated by summing correct answers across film clips, with a minimum score of 0 and a maximum score of 11.

Cognitive empathy: Dynamic Tracking Task.

Participants watched videos of two different heterosexual married couples having conversations. These conversations were selected from a study that followed couples longitudinally (Levenson, Carstensen, & Gottman, 1993; Verstaen, Haase, Lwi, & Levenson, 2018) and had been used previously to study empathy in young, middle-aged, and older adults (Sze, Goodkind, Gyurak, & Levenson, 2012). For each video, participants were asked to focus on rating the emotions of a target spouse (i.e., the wife or husband) who was highlighted with a green dot above his/her head. Using the rating dial, participants rated the valence of the emotion being experienced by the target person by moving the rating dial continuously to indicate how positive or negative they believed the target person was feeling. Each video lasted approximately 3 minutes.

Accuracy on this task was calculated using time-lagged cross correlations to determine the agreement between a caregiver’s moment-to-moment ratings of the target person’s emotions and the averaged ratings from an expert panel of graduate students trained in the Facial Action Coding, Emotional Expressive Behavioral Coding, and Specific Affect Coding systems (Coan & Gottman, 2007; P. Ekman, 1977; Gross & Levenson, 1993). To allow for differences in processing speed, the maximum correlation coefficient was selected for lags between −10 or +10 seconds following methods previously used with this task (Brown et al., 2018). Because performances for both videos on the dynamic tracking task were correlated (r = .59, t = 6.37, p < .001, 95% CI [.42, .72]), a composite accuracy score was calculated by averaging the maximum cross correlation coefficient for the two videos. Higher averaged cross correlation coefficients indicated greater accuracy on this task.

Emotional empathy: Film depicting suffering.

Participants watched a film clip that has been found to induce concern and distress in young, middle-aged, and older adults (Sze, Gyurak, Goodkind, & Levenson, 2012). The film consists of images of people in Darfur suffering from starvation and disease. The film lasted 120 seconds and was preceded by a 60 second baseline period during which an “X” was displayed on the monitor. After the film, participants rated on a 0-2 scale how much they felt 10 positive and negative emotions (affection, fear, amusement, anger, shame, disgust, embarrassment, enthusiasm, pride, surprise) as well as concern and distress.

Physiological responses to the film were computed by subtracting the average level of each measure during the pre-film baseline from the average level during the last 80 seconds of the film, which had previously been found to produce the most intense emotional facial responses (Sze, Gyurak, et al., 2012). The responses were combined into a composite score as described above. Facial behavior was also coded during the final 80 seconds of the film. A composite measure of negative facial behavior was obtained by summing the intensity scores for seven negative emotion codes (sadness, confusion, anger, fear, surprise, contempt, and disgust). Inter-coder reliability was high (intraclass correlation coefficient = .83). Self-reported emotional experience was calculated by summing the total reported intensity for seven negative and two caring emotions (fear, anger, surprise, sadness, disgust, shame, distress, affection, concern).

Emotional reactivity: Acoustic startle task.

Participants were told to relax and watch the computer screen. An “X” was displayed on the screen when the pre-trial baseline began and remained in view for 60 seconds. A loud startle stimulus (115 dB, 100 ms burst of white noise) was then presented without warning using speakers located behind the participant. Participants sat through a 60 second post startle period during which an “X” was presented on the screen. After the post startle period, participants rated on a 0-2 scale how much they felt 10 positive and negative emotions (affection, fear, amusement, anger, shame, disgust, embarrassment, enthusiasm, pride, surprise). We used this task, which has been used previously with participants of all ages (Levenson et al., 2008; Soto, Levenson, & Ebling, 2005; Sturm et al., 2006), to provide a measure of emotional reactivity to an aversive stimulus that is experienced directly, rather than vicariously (as with the film depicting suffering).

Self-reported emotional experience was calculated by summing the total intensity for the seven emotions that are typical responses to the startle task (Sturm et al., 2006): surprise, sadness, anger, fear, disgust, embarrassment, and amusement. Due to laboratory sessions ending early because of PWD fatigue or caregivers declining to participate in all tasks, data on this task were obtained from only 68 participants. Physiology and facial behavior were also recorded during this task; however, this data was not used in analyses (see below).

Correlations between laboratory tasks.

Table 2 displays correlations between laboratory measures. Supplemental Figure 1 displays the distributions of these laboratory measures.

Table 2.

Correlation coefficients between measures of caregiver mental health (depression and anxiety composite), caregiver cognitive empathy (accuracy on films or tracking tasks), caregiver emotional empathy (responses to film of suffering), and caregiver emotional reactivity (responses to acoustic startle task).

Cognitive Empathy Emotional Empathy Emotional Reactivity
1 2 3 4 5 6 7
1. Depression and anxiety .1 −.01 −.2 .29* −.07 .15
2. Cognitive Empathy (emotion recognition) .09 .1 −.2 .03 .03
3. Cognitive Empathy (dynamic tracking) .1 −.1 .13 .16
4. Emotional Empathy (physiological) −.1 .09 .01
5. Emotional Empathy (self-reported) 0 .22
6. Emotional Empathy (facial behavior) −.01
7. Emotional Reactivity (self-reported)
*

p < .05

Validity for laboratory tasks.

The emotion recognition task has criterion validity as it is correlated with performance on standardized emotion recognition tasks using standardized photographs of emotional facial expressions (Goodkind et al., 2015). Whereas the emotion recognition film task captures recognition of discrete emotion states, the dynamic tracking task captures recognition of emotional valence over time. We expect these two different cognitive empathy tasks to capture different aspects of recognizing emotion. The dynamic tracking task shows discriminant validity as it is not correlated with performance on the emotion recognition task (as noted above). This discriminant validity has also been demonstrated in a previous study, in which performance on the dynamic tracking task is not correlated with performance on recognizing emotion from standardized photographs of emotional facial expressions (Sze, Gyurak, et al., 2012). The emotional empathy task has content validity as the film was selected to induce negative and caring emotions for others, and this is film has been shown to effective induce these emotional experiences (Lwi, Haase, Shiota, Newton, & Levenson, 2019; Sze, Gyurak, et al., 2012). Furthermore, the emotional reactivity task has content validity as responses to the acoustic startle have well-characterized and well-documented emotional responses (P. Ekman, Friesen, & Simons, 1985; Roberts et al., 2004; Sturm et al., 2006).1

Other Measures

PWD disease severity.

At UCSF, the Clinical Dementia Rating Scale (CDR) was completed using a semi-structured interview conducted by clinicians with caregivers (Morris, 1993). The CDR assesses functional performance in six domains: (1) memory, (2) orientation, (3) judgement and problem-solving, (4) community affairs, (5) home and hobbies, and (6) personal care. Scores in each domain range from 0 (none) to 3 (severe) and are summed to create a composite score, ranging from 0 to 18, with higher scores indicating greater disease severity. This measure is often used to stage disease severity in individuals with dementia (Morris, 1997; M. M. Williams, Storandt, Roe, & Morris, 2013). The CDR has been validated against neuropathology data (Berg, McKeel, Miller, Baty, & Morris, 1993) and demonstrates good reliability (Burke et al., 1988).

PWD cognitive impairment.

At UCSF, the Mini-Mental State Examination (MMSE) was administered to assess the severity and progression of cognitive impairment (Folstein, Folstein, & McHugh, 1975). This exam evaluates several domains of cognitive functioning: (1) orientation, (2) visuospatial construction, (3) language, (4) concentration or attention, (5) working memory, and (6) memory recall. A total score is calculated, ranging from 0-30, with lower scores indicating greater cognitive impairment. This measure is often used to detect dementia and stage disease course (O’Bryant, Humphreys, et al., 2008; O’Bryant, Waring, et al., 2008). The MMSE has demonstrated good reliability and validity for grading cognitive impairment (Tombaugh & McIntyre, 1992).

Caregiver mental health.

Within a month following the laboratory session at UCB, caregivers completed two questionnaires online to assess their mental health. Depression was measured using the Center for Epidemiological Studies Depression Scale (CESD; Radloff, 1977), which has respondents rate themselves over the past week on a scale from 0 (“rarely or none of the time”) to 3 (“most or all of the time”) for 20 items (e.g., “I felt sad”, “I felt lonely”). Four items were reverse scored and then all items were summed, with higher scores indicating greater levels of depression symptoms. The CESD has been previously validated for measuring depression in older adults (Beekman et al., 1997; Haringsma, Engels, Beekman, & Spinhoven, 2004). Anxiety was measured using the Beck Anxiety Inventory (BAI; Steer & Beck, 1997), which has respondents rate themselves over the past month on a scale from 0 (“not at all”) to 3 (“a lot”) for 21 items (e.g., “Unable to relax”). Scores were summed, with higher scores indicating greater levels of anxiety symptoms. The BAI has demonstrated reasonable test-retest reliability and validity when used with individuals with anxiety disorders (Beck, Epstein, Brown, & Steer, 1988; Fydrich, Dowdall, & Chambless, 1992).

Because the CESD and BAI were significantly correlated in our sample (r = .68, t = 8.14, p < .001, 95% CI [.54, .79]), and to reduce the risk of Type I errors from multiple comparisons, a composite of caregiver mental health symptoms was computed by z-scoring the CESD and BAI and averaging these z-scores. Higher scores on the composite of mental health indicate greater severity of averaged depression and anxiety symptoms.

Sensitivity power analyses

Because we recruited a convenience sample to maximize our sample size, we could not conduct a priori power analyses. To determine if our study had adequate power to detect effects, we conducted two sensitivity power analyses. For analyses with our full sample size of 78, a maximum of 5 predictors, alpha level = .05, and power = .80, we computed a medium effect size of f2 = .18 (Cohen, 1988). Only 68 participants completed the acoustic startle task (see above). For analyses with a sample size of 68, a maximum of 5 predictors, alpha level = .05, and power = .80, we computed a medium effect size of f2 = .21. Thus, our study was adequately powered to detect medium effect sizes.

Analytic approach

Bivariate Pearson correlations were conducted to examine: (a) the relationship between caregiver cognitive empathy and caregiver mental health, and (b) the relationship between caregiver emotional empathy and caregiver mental health. Then, if significant associations were found, linear regression analyses were conducted with inclusion of covariates, including relevant demographic or clinical variables (identified below) and caregiver emotional reactivity. We focused on independent significant associations from correlations in order to avoid potential suppressor effects in multivariate linear regression (Beckstead, 2012). Physiology, facial behavior, or self-reported emotional responses to the emotional reactivity task were used as a covariate, depending on the type of empathy response (i.e., physiological, behavioral, or self-report) that emerged as being significantly associated with caregiver mental health.

Identifying covariates

We calculated correlations between caregiver demographic or PWD clinical variables and caregiver mental health to identify covariates to include in our primary analyses of the relationship between caregiver emotional functioning (cognitive empathy, emotional empathy, emotional reactivity) and caregiver mental health. Potential covariates included caregiver age; caregiver gender (0 = man, 1 = woman); caregiver race, as a crude index for systemic oppression based on race (given the small number of People of Color, this variable was coded as 0 = White, 1 = non-White); caregiver education (0 = High School, 1 = 2-year college, 2 = 4-year college, 3 = Master’s degree, 4 = MD, PhD, or other professional degree); caregiver relationship to PWD (1 = spouse, 0 = non-spouse); PWD diagnosis (FTD, AD, or Motor; three variables coded as 1 = yes, 0 = no); PWD disease severity; and PWD cognitive functioning.

Caregiver race (non-White), greater PWD disease severity, and lower PWD cognitive functioning were correlated with worse caregiver mental health in our sample, thus, they were included as covariates in analyses (race: r = .23, t = 2.05, p = .04, 95% CI [.007, .43], disease severity: r = .37, t = 3.57, p < .001, 95% CI [.17, .55]; cognitive functioning: r = −.28, t = −2.50, p = .01, 95% CI [−.47, −.06]).

Caregiver age, gender, education, relationship to PWD, and PWD diagnosis variables were not correlated with caregiver mental health in our sample, thus they were not included as covariates in analyses (caregiver age: r = −.19, t = −1.60, p = .11, 95% CI [−.41, .05]; caregiver gender: r = .18, t = 1.48, p = .14, 95% CI [−.06, .40]; caregiver education: r = .02, t = .17, p = .87, 95% CI [−.20, .24]; caregiver relationship: r = −.10, t = −.85, p = .40, 95% CI [−.31, .13]; FTD diagnosis: r = −.02, t = −.15, p = .88, 95% CI [−.24, .21]; AD diagnosis: r = −.07, t = −.62, p = .54, 95% CI [−.29, .15]; Motor diagnosis: r = .10, t = .91, p = .37, 95% CI [−.12, .32]).

Results

Caregiver cognitive empathy and caregiver mental health

Neither caregiver accuracy on the emotion recognition task (r = .13, t = 1.12, p = .27, 95% CI [−.10, .34]) nor on the dynamic tracking task (r = −.01, t = −.10, p = .91, 95% CI [−.23, .21]) was related to caregiver mental health.

Caregiver emotional empathy and caregiver mental health

Caregiver self-reported emotional experience to the film depicting suffering was associated with caregiver mental health, such that greater experience of negative and caring emotions was related to lower mental health (r = .29, t = 2.66, p = .009, 95% CI [.07, .48]). See Figure 1. In contrast, caregiver physiological responses (r = −.14, t = −1.24, p = .22, 95% CI [−.35, .09]) and facial behavior responses (r = −.07, t = −.61, p = .55, 95% CI [−.29, .16]) to the film depicting suffering were not related to caregiver mental health.2

Figure 1.

Figure 1.

Scatterplot of the sum of intensity for self-reported emotional empathy (in response to the Darfur film depicting suffering) and caregiver mental health (composite of caregiver depression and anxiety symptoms). Greater self-reported emotional empathy was associated with worse caregiver mental health. This relationship was significant in a zero-order Pearson correlation and in linear regressions accounting for caregiver race, PWD disease severity, PWD cognitive functioning, and caregiver self-reported emotional reactivity (in response to the acoustic startle task). Note: one caregiver had a depression and anxiety composite score greater than three standard deviations from the mean (z = 4.03). All findings remained the same without this outlier.

We evaluated the robustness of the relationship between greater emotional empathy (i.e., self-reported emotional experience to film depicting suffering) and lower caregiver mental health in two ways: (a) accounting for covariates, and (b) accounting for covariates and for caregiver emotional reactivity (i.e., self-reported emotional experience to the acoustic startle task).

Accounting for covariates.

We conducted a linear regression accounting for caregiver race, PWD disease severity, and PWD cognitive functioning (the variables found to be independently predictive of caregiver mental health above). When these variables were entered as covariates, greater emotional empathy (self-reported emotional experience) was still related to worse caregiver mental health (t = 2.62, β = .25, p = .01).

Accounting for covariates and caregiver emotional reactivity.

We conducted a linear regression accounting for self-reported emotional experience to the acoustic startle task as well as caregiver race, PWD disease severity, and PWD cognitive functioning. In this analysis, caregiver emotional reactivity was not associated with caregiver mental health (t = .59, β = .06, p = .55). However, greater emotional empathy (self-reported emotional experience) remained associated with worse caregiver mental health (t = 2.74, β = .30, p = .008).

Caregiver emotional empathy and mental health: Depression and anxiety considered separately

Although measures of caregiver depression and anxiety were highly correlated in our sample, for transparency, we examined relationships between caregiver emotional empathy (self-reported emotional experience) and depression and anxiety considered separately. Linear regressions accounting for caregiver emotional reactivity, caregiver race, PWD disease severity, and PWD cognitive functioning revealed that greater emotional empathy was associated with greater depression symptoms (t = 2.97, β = .33, p = .004) and with greater anxiety symptoms at trend level (t = 1.94, β = .23, p = .057). In contrast, caregiver emotional reactivity was not associated with either depression (t = −.28, β = −.03, p = .78) or anxiety (t = 1.26, β = .14, p = .21) symptoms.

Discussion

The present study examined the relationship that laboratory measures of emotional and cognitive empathy have with mental health in a sample of PWD caregivers. Results were partially consistent with our hypothesis that laboratory measures of emotional empathy would be associated with poor caregiver mental health. We found an association between one of the three emotional empathy measures (self-reported emotional experience to the emotional empathy task) and caregiver mental health, using a composite measure of depression and anxiety symptoms. Given the heightened depression and anxiety found in PWD caregivers (Brodaty & Donkin, 2009; Coope et al., 1995; Cuijpers, 2005; Kolanowski et al., 2004) and the increasing prevalence of caregiving for PWDs due to the aging population (Schulz et al., 2020), this finding suggests an important risk factor and possible intervention target for clinical psychologists and other health professionals who are concerned with late-life mental health issues.

Emotional empathy and caregiver mental health

Historically, clinical psychologists have considered empathy to be a highly desirable quality that is associated with desirable outcomes (Elliott, Bohart, Watson, & Murphy, 2018; Rogers, 1957). However, in the present study we found the opposite, with high levels of a particular aspect of empathy (i.e., emotional empathy as measured by self-reported negative and caring emotions in response to viewing the suffering of others) associated with an undesirable outcome (i.e., greater severity of mental health symptoms) in PWD caregivers. Of course, these findings are not without precedent, but rather are consistent with prior research indicating that high levels of emotional empathy are associated with poorer mental health in the context of others’ suffering. For example, prior research has found that too much empathy leads to empathy burnout and emotional distress in nurses, doctors, and other healthcare providers who regularly interact with distressed or suffering individuals (Decety & Fotopoulou, 2014; Figley, 2011). Similarly, an optimal level of empathy (i.e., not too much or too little) is thought to be critical for having a better psychological distinction between oneself and another’s distress (E. Ekman & Halpern, 2015). Having too much emotional empathy runs the risk of reducing this psychological distinction (Lee et al., 2001) and is considered an important cause of over-identification with patients in healthcare professionals (Decety & Fotopoulou, 2014). Our findings similarly exemplify the adages that “it depends on the context” and that one can have “too much of a good thing.” In the context of caring for a PWD, caregivers high in emotional empathy may become overly enmeshed, taking on the added burden of feeling the distress and suffering experienced by a loved one who is dealing with the ravages of a cruel, progressive, and ultimately terminal illness. For these caregivers, chronically experiencing a combination of their own distress and that of the person in their care could greatly heighten risk for developing symptoms of depression and anxiety.

Previous psychological and neuroscience research suggests that individuals who can regulate their own emotional responses to others’ suffering (and thus have optimal levels of emotional responses) can express greater concern for others instead of feeling overwhelming emotional distress (Decety & Meyer, 2008; Ho, Konrath, Brown, & Swain, 2014; A. Williams, O’Driscoll, & Moore, 2014). Caregivers may similarly benefit from evidence-based interventions that help them manage their negative emotional responses to the suffering of others in order to help maintain the distinction between self and other. Emotional responses, including those elicited as a function of empathy, are amenable to influence by emotion regulation processes (Thompson, Uusberg, Gross, & Chakrabarti, 2019; Zaki, 2014; Zaki, Bolger, & Ochsner, 2008). One well-studied regulation strategy is to engage in self-distancing, a form of adaptive self-reflection in which a “fly on the wall” approach is taken to process one’s emotional experiences (Kross, Gard, Deldin, Clifton, & Ayduk, 2012; Verduyn, Van Mechelen, Kross, Chezzi, & Van Bever, 2012). This approach has been demonstrated to be helpful in the context of relationships (Ayduk & Kross, 2010) in which high self-distancers respond to negative emotions from partners with less reciprocation of negative emotions, thus allowing for reconstrual of difficult situations. Therapists who use a similar distancing approach (e.g., imagining greater psychological distance from overwhelming client distress and the client themselves) report greater psychological well-being (Weilenmann et al., 2018). In the caregiver-PWD dyad, a caregiver may be advised to observe mentally their own emotional responses “from afar” in response to the PWDs’ distress. Slowing down the pace and reducing the magnitude of the immediate negative emotional responses may reduce distress levels and allow for greater psychological distinction between caregivers and PWDs. Of course, compared to healthcare professionals and their patients, familial caregivers and PWDs are likely to share a much longer, more intimate, and more personal history. This can make separating oneself from the PWD’s suffering particularly difficult, especially for caregivers who are high in emotional empathy. Future research should examine whether helping caregivers who are high in emotional empathy learn to regulate their emotions to others’ suffering and maintain distinction between self and other has preventative and/or therapeutic value for protecting mental health.

Robustness of findings

Our findings were robust to a number of covariates found to be related to caregiver mental health (caregiver race, PWD disease severity, and PWD cognitive functioning) and a measure of caregiver emotional reactivity (self-reported emotional experience to an acoustic startle stimulus). There is a wealth of literature on caregivers’ demographic and PWDs’ clinical variables that are associated with poor caregiver mental health (Cooper, Balamurali, & Livingston, 2007; Schulz et al., 2020). However, even after accounting for these potential influences in our sample, the relationship between caregiver emotional empathy and mental health remained. Moreover, several prior studies have found that caregivers who experience more negative emotions are more vulnerable to negative mental health outcomes (Brodaty & Donkin, 2009; Safavi et al., 2015). However, in our study, even after controlling for caregivers’ emotional responses to an aversive stimulus, the relationship between caregiver emotional empathy and mental health remained. We conclude from these findings that, in our study sample, emotional empathy plays an important role in caregivers’ mental health above and beyond the role of other well-established factors related to patient functioning, caregiver demographics, and caregiver emotional reactivity.

Limited to self-report aspect of emotional empathy

It is important to note that among the multiple aspects of caregivers’ emotional empathy (physiological, behavioral, self-reported emotional experience) that we assessed, only greater self-reported emotional experience in response to a film depicting suffering was associated with worse caregiver mental health. This specificity in findings may have implications for identifying caregivers most at risk for poor mental health. Because emotional empathy behavior was not associated with caregiver mental health, it may be difficult for clinicians and outside observers to recognize if caregivers are not faring well.3 Clinicians and outside observers may ask caregivers directly about their emotional experiences (particularly those that are relevant to another person’s suffering) in order to identify those who may be at greater risk.

Although physiological, behavioral, and self-report aspects of emotional responding can cohere in certain situations (Brown et al., 2019; Mauss, Levenson, McCarter, Wilhelm, & Gross, 2005), this is certainly not always the case (Evers et al., 2014; Reisenzein, Studtmann, & Horstmann, 2013). We have argued previously that self-reported emotional experience is much more malleable to contextual influences than physiological and expressive aspects of emotion (e.g., culture; Levenson, Soto, & Pole, 2007; Soto et al., 2005). Self-reported emotional experience arises from complex appraisals that include both contextual and interoceptive processes (Levenson, 1999; Levenson, 2003; Levenson et al., 2017) and thus may tap into some of the same processes that contribute to symptoms of anxiety and depression. Consequently, although some PWD caregivers may respond to a film depicting suffering with heightened facial expressions of negative emotions and autonomic nervous system activation, it may be those who report actually “feeling” high levels of negative emotions and concern for whom the worries, loneliness, burdens, and grief associated with caregiving are most profound and developing symptoms of depression and anxiety is most likely. Conversely, those who have more severe depression and anxiety symptoms may be more likely to report “feeling” high levels of negative emotions and concerns for others.

Cognitive empathy and caregiver mental health

In contrast to the robust relationship we found between greater emotional empathy and worse mental health in PWD caregivers, we found no relationship between either of the two measures of cognitive empathy and caregiver mental health. Prior literature suggests that professional healthcare providers (e.g., physicians, nurses) with greater cognitive empathy experience better psychological outcomes by increasing emotional distance and focusing on how the distressed person feels rather than sharing that distress (Cusi, Macqueen, Spreng, & McKinnon, 2011; E. Ekman & Halpern, 2015; Halpern, 2003). Although a similar association could be expected for familial caregivers who are high in cognitive empathy, we found no evidence supporting this in our sample of caregivers and PWDs. Nonetheless, additional research with caregivers for individuals with other disorders, at other stages of caregiving, and with yet other measures of cognitive empathy would be worthwhile.

Causality

Because the present study utilized a cross-sectional design, findings raise important questions regarding the direction of influence. It is impossible to know from our data whether caregiver emotional empathy influences caregiver mental health or vice versa. Indeed, similar associations between emotional empathy and mental health have been found in research for individuals with depression, anxiety, and other forms of psychopathology. For example, individuals with more severe psychopathology symptoms have been shown to have greater emotional empathy (O’Connor, Berry, Weiss, & Gilbert, 2002; Thoma, Schmidt, Juckel, Norra, & Suchan, 2015; Tibi-Elhanany & Shamay-Tsoory, 2011) and have trouble effectively regulating their emotional states (Sheppes, Suri, & Gross, 2015; Thompson et al., 2019). Future research using longitudinal and experimental designs would be critical for understanding the directional influences between caregiver emotional empathy and caregiver mental health.

Strengths and Limitations

Strengths of this study include: using laboratory-based measures of emotional and cognitive empathy; measuring physiological, behavioral, and self-reported aspects of emotional empathy; including two measures of cognitive empathy (emotion recognition and dynamic tracking tasks); examining and accounting for demographic factors, PWD characteristics, and caregiver emotional reactivity, all of which could influence caregiver mental health; and including caregivers who were providing care for PWDs with heterogenous diagnoses to increase generalizability.

Limitations of the study include: using self-report measures of caregiver anxiety and depression rather than structured clinical diagnostic interviews; using stimuli that activated different emotions across cognitive empathy and emotional empathy tasks, rather than consistently using stimuli showing others’ suffering, which limits our ability to compare across facets of empathy; difficulty ruling out spontaneous emotion regulation used by caregivers, which may have impacted their emotional responses to our laboratory tasks; using a cross-sectional design that limits ability to determine causal and directional influences; lack of comparison groups (e.g., caregivers of persons with other illnesses, healthy controls); and lack of diversity in race, socioeconomic status, and type of relationship to the PWD in our sample which limit the generalizability of our findings.

Conclusions

We examined the relationships between two facets of empathy and mental health in a sample of familial caregivers of PWDs with a number of different kinds of dementia and neurodegenerative diseases. Our findings indicate that greater emotional empathy in caregivers (as indicated by greater self-reported experience of negative emotions and concern in response to viewing the suffering of others) is associated with worse mental health (i.e., greater severity of depression and anxiety symptoms) in caregivers. Given the enormous number of PWDs and family caregivers worldwide and projections that this number will increase dramatically in the future, depression, anxiety, and other mental health problems in caregivers will undoubtedly become an increasingly important concern on the research, assessment, and intervention agendas for clinical psychology. Recognizing factors that increase caregiver vulnerability to poor mental health can help identify caregivers at heightened risk who may benefit from existing interventions and point toward targets for developing new interventions. Our findings suggest that it might be useful to design and evaluate interventions that help PWD caregivers regulate their emotional responses to the distress of the person in their care. Given findings that poor mental health in caregivers is also associated with greater mortality in PWDs (Lwi, Ford, Casey, Miller, & Levenson, 2017), finding ways to reduce mental health problems in caregivers could greatly improve the quality of life for both caregivers and the persons in their care.

Supplementary Material

1

Acknowledgements

We would like to thank our participants, Scott Newton, Deepak Paul, and all of the past and present members of the Berkeley Psychophysiology lab.

Funding

Preparation of this manuscript was supported by a National Institute of Aging grants awarded to R.W.L. (4R01AG041762-05 and 1R01AG062639-01).

Footnotes

Conflict of Interest

The authors declare no conflicts of interest with respect to the authorship or the publication of this article.

1

Test re-test reliability for laboratory tasks. Given the nature of our participant pool (PWDs’ diseases are progressive), we typically only have one opportunity to enroll PWDs and their caregivers in our laboratory study. Thus, we do not have the ability to demonstrate test-retest reliability of our laboratory tasks with this sample.

2

To ensure we did not inadvertently influence our results by removing caregiver emotional empathy task measures from our analyses too soon, we conducted an additional analysis to include caregiver physiological responses and facial behavior to the emotional empathy task as additional covariates. We conducted a linear regression accounting for caregiver race, PWD disease severity, PWD cognitive functioning, caregiver physiological response, and caregiver facial behavior response as covariates. When these variables were entered as covariates, greater emotional empathy (self-reported emotional experience) was still related to worse caregiver mental health (t = 2.60, β = .26, p = .01), whereas caregiver physiological responses to the emotional task (t = −.52, β = −.05, p =.61) and caregiver facial behavior to the emotional empathy task were still not associated with caregiver mental health (t = −.72, β = −.07, p = .47).

3

We would like to thank and recognize Reviewer 2 as the source of this comment.

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