Table 2 Overview of domains, constructs, assessments, and respective time points at which each assessment is administered

Therapy Expectancy

Expectancy

Credibility and Expectancy Questionnaire (CEQ)

x

Psychological Flexibility

Psychological Flexibility/ Emotional Avoidance

Acceptance and Action Questionnaire – II (AAQ-II)

x

x

x

Process of Psychological Flexibility

PsyFlex (PF)

x

x

x

x

x

x

Behavioral Test/Experiment

Behavioral Avoidance Test (BAT): Heat Induction Test

x

x

x

Social interactions

Overall Social Support

Oslo Social Support Scale (OSS-3)

x

x

x

Social Interaction

Social Interaction Scale (SIS)

xⁱ

xⁱ

x

x

x

xⁱ

Relationship Satisfaction

Relationship Assessment Scale (RAS)

xⁱ

xⁱ

x

xⁱ

Social Network Quality

Social Network Quality and Action Scale (SNQAS)

xⁱ

xⁱ

x

x

x

xⁱ

ACT-Skills

Cognitive Fusion

Cognitive Fusion Questionnaire (CFQ)

x

x

x

Mindfulness

Five Facet Mindfulness Questionnaire - short version (FFMQ-FS)

x

x

x

Values

Valued Living Questionnaire (VLQ)

x

x

x

Well-being

General Functioning

WHO Disability Assessment Schedule 2.0 (WHODAS 2)

x^p

x

x

Flourishing Mental Health/ well-being

Mental Health Continuum – Short Form (MHC-SF)

x^ip

xⁱ

xⁱ

xⁱ

xⁱ

xⁱ

Meaning of Life

Meaning in Life Questionnaire (MLQ)

x

x

x

Emotion Regulation

Problematic Emotion Regulation

Difficulties in Emotion Regulation Scale (DERS)

x

x

x

Emotion Regulation

Affective Style Questionnaire (ASQ)

x

x

x

Diagnosis/ Symptomatology

DSM Diagnostic Information

Structured Clinical Interview for DSM-IV (SCID-I/Screener)

x

Depression

Beck Depression Inventory – Fast Screen (BDI-FS)

x

x

x

x

x

x

Problems and Discomfort

Brief Symptom Checklist (BSCL)

x^p

x

x

Worry (GAD)

Penn State Worry Questionnaire (PSWQ)

(x)

(x)

(x)

(x)

Anxiety/Fear

Fear Questionnaire (FQ)

(x)

(x)

(x)

(x)

Obsessions and Compulsions (OCD)

The Obsessive-Compulsive Inventory, short Version (OCI-R)

(x)

(x)

(x)

(x)

Social Fear

Social Interaction Anxiety Scale (SIAS)

(x)

(x)

(x)

(x)

Stress

Perceived stress

Perceived Stress Scale (PSS)

x

x

x

Daily stress

Daily Stress Scale (DSS)

xⁱ

xⁱ

x

x

x

xⁱ

Prosocial Behavior

Prosocial Behaviors

Developmental Assets Profile – Prosocial Subscale (DAP-PS)

x

x

x

Prosociality Questionnaire (EVOS)

x

x

x

Cooperation

Cooperation Scale (COOP)

x

x

x

The Self-Report Altruism Scale (SRAS)

x

x

x

Therapy Consistent Skills

Transfer of Skills to Daily Life

Vignettes

x

x

x

x