Setting and data collection
The assessments, intervention, and in-depth interviews were mainly conducted in the Outpatient Unit Research, Teaching, and Practice of the Faculty of Psychology at the University of Vienna. Data were collected face-to-face, with trained clinical psychologists and Dari-speaking interpreters, in a confidential room to ensure privacy. Reading material was translated into Dari. The self-report measures, which were administered as a structured interview due to a high rate of illiteracy in the sample, were implemented one week before the first session of the intervention and one week after the final session. The psychologists carrying out the assessments were blinded to the group allocation at both time points. The in-depth interviews took place between 5.0 and 80.4 (MD = 52.9, IQR = 35.4) weeks after the final intervention session. All in-depth interviews were audio-recorded, transcribed using the transcription software f4transcript (Edu-version), and anonymized. Finally, an independent research assistant compared all transcripts with the audio recordings. Audio files were permanently deleted following data analysis. Demographic information was collected within the main study [