Table 2.
Self-report questionnaires and therapist ratings
| Measure | Description |
|---|---|
| Primary outcome | |
| Brief Symptom Inventory (BSI) [130] | Psychological distress |
| Secondary outcomes | |
| Affective Styles Questionnaire (ASQ) [157] | Affective Styles |
| Anxiety Sensitivity Index-3 (ASI-3) [142] | Anxiety sensitivity |
| Beck Depression Inventory II (BDI-II) [138] | Depression |
| Behavioral Inhibition Scale/ Behavioral Activation Scale (BIS/BAS) [154] | Inhibition and avoidance |
| Big Five Inventory (BFI-10) [149] | Personality |
| Clinical Global Impression (CGI) [137] | Symptom severity and treatment response |
| Disability Index (DI, adapted version of the Pain Disability Index) [146] | Impairments, focusing on physical and mental complaints |
| Fear of Negative Evaluation Scale (SANB-5) [141] | Fear of negative evaluation |
| Generic Rating Scale for Previous Treatment Experiences, Treatment Expectations, and Treatment Effects (GEEE) [150] | Therapy expectations |
| Heidelberg Form for Emotion Regulation Strategies (HFERST) [140] | Emotion regulation |
| Interpersonal Emotion Regulation Questionnaire (IERQ) [139] | Interpersonal emotion regulation |
| Interpersonal Trust Short Scale (KUSIV-3) [132] | Interpersonal trust |
| Intolerance of Uncertainty Scale (IUS) [136] | Intolerance of uncertainty |
| Inventory of Interpersonal Problems (IIP-D-32) [156] | Interpersonal problems |
| Multidimensional Emotional Disorder Inventory (MEDI) [151] | Transdiagnostic symptom dimensions |
| Patient-Reported Outcomes Measurement Information System Level 2 (PROMIS-Level 2) [155] | Anxiety |
| Penn State Worry Questionnaire (PSWQ) [153] | Worrying |
| Perseverative Thinking Questionnaire (PTQ) [135] | Perseverative thinking |
| Process-Based Assessment Tool (PBAT) [134] | The process of change in therapy |
| Response Styles Questionnaire (RSQ-K) [144] | Rumination |
| Social and Occupational Functional Assessment Scale (SOFAS) [147] | Social and occupational functioning |
|
State-Trait Anxiety Inventory, Trait-Anxiety (STAI-T) [145] |
Trait anxiety |
| Temporal Experience of Pleasure Scale (TEPS) [152] | Anticipatory and temporal pleasure |
| WHO-5 [133] | Well-being and mental health |
| Further questionnaires (baseline assessment) | |
| Brief Assessment of Gesture (BAG) [148]a | Gestures |
| Childhood Trauma Questionnaire (CTQ) [159] | Traumatic childhood experiences |
| Emotion Regulation Questionnaire (ERQ) [131]a | Habitual emotion regulation |
| Life Events Checklist for DSM-5 (LEC-5) [158] | Traumatic experiences |
| Posttraumatic Stress Disorder Checklist for DSM-5 (PCL-5) [143] | Traumatic experiences and trauma-associated symptoms |
aAssessment only during study part 3