Evaluation of ANKOMMEN as a group intervention based on life story work for adolescents in residential care in Germany: a single-arm pilot study.

Background: Adolescents face many challenges when coping with out-of-home placement, and life story work can be helpful in this context. Typically conducted in individual settings, life story work's high resource requirements pose a challenge for implementation in the standard care of youth welfare institutions. To address this issue, the ANKOMMEN intervention was developed as a manualized group program for adolescents in residential care focusing on processing and coping with experiences associated with their out-of-home placement.

Method: The intervention was evaluated in a single-arm pilot study with questionnaires administered at three time points (pre-intervention, post-intervention, and 3-month follow-up). The primary outcome was self-efficacy, while secondary outcomes included self-esteem, depressive symptoms, posttraumatic stress symptoms, and behavioral problems. A total of 31 intervention groups with 115 adolescents (M = 14.91 years; SD = 1.45; 52.2% male) were conducted between October 2020 and September 2022 in Germany. Data were analysed using mixed effect models.

Results: Pre-post comparisons revealed increased self-efficacy (d = -0.80) and self-esteem (d = -0.68) among participants with below-average scores prior to the intervention. Additionally, there was a decrease in self-reported depressive symptoms (d = 0.76), self-reported posttraumatic stress symptoms (d = 0.58), self-reported internalizing behavior problems (d = 0.74), caregiver-reported internalizing behavior problems (d = 0.76), and self-reported externalizing behavior problems (d = 0.52) for participants with clinically relevant scores prior to the intervention. These improvements were stable in the 3-month follow-up assessment. Furthermore, the intervention proved its feasibility in standard care within the context of the evaluation study.

Conclusions: The results of the pilot study provide preliminary evidence for the feasibility and potential effectiveness of ANKOMMEN but further research is needed to obtain valid evidence for the efficacy of the intervention.