Maughan, Andrea LLunsky, YonaLake, JohannaMills, Jennifer SFung, KennethSteel, LeeWeiss, Jonathan A2024-10-022024-10-022023-05-111362-36131461-7005https://doi.org/10.1177/13623613231172241https://hdl.handle.net/10315/42332Emerging research shows that Acceptance and Commitment Therapy (ACT) may improve mental health for caregivers. Parents of autistic children, adolescents, and adults (N = 54) were randomly assigned to either complete a brief group-based ACT intervention or remain on the waitlist. Participants completed surveys immediately prior to randomization, and 3-, 7-, and 17-weeks post-randomization. The primary outcome was depression symptoms and secondary outcomes included stress, goal attainment, positive affect, ACT psychological processes, child mental health, and family functioning. Mixed effects linear models testing Group × Time interaction indicated the Treatment group (n = 27) demonstrated greater post-intervention improvements than the Waitlist group (n = 27) in parent depression (p =.03, d = −0.64) and family distress (p =.04, d = −0.57). Treatment group parents also reported greater short-term gains in positive affect (p =<.001, d = 0.77) and personal goal attainment (p =.007, d = 0.80), compared to the Waitlist group. Although there was no significant Group × Time interaction for other outcomes, stress (b = −2.58, p =.01), defusion (b = −3.78, p =.001), and experiential avoidance (b = −4.22, p =.01) showed improvement for the Treatment group, but not the Waitlist group, at post-intervention. All Treatment group improvements were maintained at follow-up. Results suggest that a brief ACT group intervention is efficacious for improving some aspects of mental health for parents of autistic children. Lay abstract: Parents of autistic children commonly experience difficulties with their own mental health. This study looked at the effects of a brief group-based Acceptance and Commitment Therapy program, developed for parents of autistic children, youth, and adults. ACT focuses on increasing psychological flexibility, which is the ability to be mindful and accepting of difficult thoughts and experiences, shown to be important for mental wellness. Participants included 54 parents of autistic people, ages 3–34. Parents were randomly divided into two groups: a Treatment group that received the intervention right away, and a Waitlist group that completed the program after the Treatment group completed the trial. All parents filled out questionnaires right before the program began, and at 3, 7, and 17 weeks after randomization. Compared to the group that was waiting to participate in the program, parents in the Treatment group reported greater improvements in depression and family distress, and these improvements were still present 4 months later. Parents in the Treatment group also reported short-term improvements in their positive feelings and personal goals, compared to those waiting. Results showed that ACT may help improve some aspects of mental health for parents of autistic children, but further research is recommended.Print-ElectronicenAttribution 4.0 InternationalClinical and Health PsychologyPsychologyClinical ResearchBrain DisordersPediatricBehavioral and Social ScienceMental HealthHealth DisparitiesClinical Trials and Supportive ActivitiesIndividual care needsMental healthGood Health and Well BeingAdolescentAdultChildHumansAcceptance and Commitment TherapyAutism Spectrum DisorderAutistic DisorderParentsSurveys and QuestionnairesChild, PreschoolYoung AdultAdolescentAdultChildHumansAcceptance and Commitment TherapyAutism Spectrum DisorderAutistic DisorderParentsSurveys and QuestionnairesChild, PreschoolYoung AdultHumansParentsAutistic DisorderAdolescentAdultChildChild, PreschoolYoung AdultAcceptance and Commitment TherapySurveys and QuestionnairesAutism Spectrum DisorderAdolescentAdultChildHumansAcceptance and Commitment TherapyAutism Spectrum DisorderAutistic DisorderParentsSurveys and QuestionnairesChild, PreschoolYoung AdultArticleCC BY