Investigation the effect of Acceptance and Commitment Therapy (ACT) training on stigma and family functioning in family members of patients with psychiatric disorders: a randomized controlled clinical trial

Regarding the prevalence and pervasiveness of psychiatric disorders, which significantly affect not only the patients themselves, but also their families, family therapy has emerged as a promising intervention. This research examined the effects of Acceptance and Commitment Therapy (ACT) on stigma and family functioning in family members of patients with psychiatric illnesses, demonstrating effectiveness in improving family functioning and coping strategies in the face of mental illness. This randomized controlled clinical trial without blinding. Forty family members of patients with psychiatric disorders were randomly assigned to an intervention group (N = 20) or a control group (N = 20). The intervention group received ACT in eight weekly sessions, each lasting 90 min, while control group remained on a waiting list. Both groups were assessed at three time points: pre-intervention, post-intervention, and at a one-month follow-up. Data collection instruments included a demographic information questionnaire, a stigma assessment, and a family functioning measure. Data were analyzed using SPSS software version 23. A statistically significant difference was observed between the mean post-test and follow-up stigma scores of the intervention and control groups (P