Effectiveness of a life story intervention for adults with intellectual disability and depressive and trauma-related complaints.

The study used a quasi-experimental design with a matched control group rather than randomisation, which increases the risk of bias. The intervention group also received care as usual (e.g., CBT, nursing care), so the specific contribution of the life story intervention versus other concurrent treatments cannot be separated. Only participants who completed all assessments were included in the analysis, which may overestimate the effect if dropouts had different outcomes. The follow-up period was short (two months after the end of the intervention). Therapy fidelity was not assessed, so it is unclear if the intervention was delivered consistently as intended. The study relied entirely on self-report measures, which may be challenging for some participants with intellectual disability, although staff support was provided.

Do not assume the life story intervention alone caused the improvement. The intervention group also received care as usual, including other therapies and nursing support, and the study did not separate these components. The quasi-experimental design without randomisation means the results are suggestive but not definitive proof of efficacy.