Parents/Caregivers of children with autism need psychological flexibility and self-efficacy for the ACT program to be effective.

This study will compare intervention differences between groups. Repeated measures will be given three times (pre-intervention, post-intervention, and follow-up) to an ACT intervention group and a support group (control). The purpose of the present study is to compare the effects of a brief ACT-based workshop for parents of children with autism with a concurrent parent support control group using a variety of self-report measures addressing psychological flexibility, depression, thought suppression, cognitive fusion, positive aspects of caregiving, stress, self-compassion, and valued living.

Inclusion Criteria:

• Individuals will be eligible for entry if (1) they are the biological or adoptive parent (and primary caregiver) of a child with a diagnosis of an autism spectrum disorder, (2) the child is 2-17 years of age inclusive, (3) speak English, and (4) they plan to live in the area for at least six months and (5) present proof of vaccination and (6) agree to masking and social distancing during the in-person workshop.

Exclusion Criteria:

• Individuals will be excluded from the study if (1) they are involved in a concurrent clinical trial of psychosocial interventions for parents/caregivers or (2) they (or their child/spouse) indicate during telephone screening or on the demographics questionnaire active major medical issues such as cancer, organ transplant, or severe mental health disorders that prevent active participation.

In the following standard research practices, the data will never contain identifying or potentially identifying information. The participant identities and responses to assessments will be downloaded from Qualtrics and stored only on Shannon Harper's password-protected computer. The data will be saved on a password-protected computer for 10 years after publication, and then the data will be destroyed.