Acceptance and Commitment Therapy for the Parents of Children and Adolescents with Autism Spectrum Disorder: A Systematic Review and Meta-Analysis of Randomized Controlled Trials: La thérapie d’acceptation et d’engagement pour les parents d’enfants e

Background Parents of children with autism spectrum disorder (ASD) experience significantly higher levels of stress, anxiety and depression. Acceptance and Commitment Therapy (ACT) has emerged as a promising intervention; however, the evidence remains inconsistent. This meta-analysis aims to evaluate the efficacy of ACT-based interventions in parents of children and adolescents with ASD. Methods In February 2026, we conducted a systematic search of PubMed, Scopus, Web of Science, Cochrane Library and Embase for randomized controlled trials (RCTs) assessing ACT-based interventions in parents of children/adolescents with ASD. For the meta-analysis, we used R software (version 4.5.0) with RStudio (2024.12.1 + 563) and the meta package. Results We included seven RCTs with a total of 698 participants. Acceptance and Commitment Therapy significantly reduced parenting stress compared to control conditions, as measured by the Parenting Stress Index – Short Form Total Stress (mean difference [MD] = −7.05, 95 per cent CI −9.90 to −4.19, p < 0.0001, I 2 = 0 per cent), with consistent improvements across all subscales (Parental Distress, Parent–Child Dysfunctional Interaction and Difficult Child). Acceptance and Commitment Therapy also significantly improved psychological flexibility on the Acceptance and Action Questionnaire-II and Parenting Sense of Competence scale. For child outcomes assessed in our analysis, ACT significantly reduced total difficulties on the Strengths and Difficulties Questionnaire (MD = −2.80, 95 per cent CI −4.71 to −0.88, P = 0.004, I 2 = 0 per cent) and conduct problems (MD = −0.98, 95 per cent CI −1.62 to −0.33, P = 0.003, I 2 = 0 per cent). Conclusion Acceptance and Commitment Therapy-based interventions may be effective for reducing parenting stress, improving psychological flexibility, enhancing parenting competence and reducing child behavioural difficulties in parents of children with ASD. However, the limited number of studies and clinical heterogeneity might limit our findings, highlighting the need for future large-scale RCTs with longer follow-up.