Systematic Review of Acceptance and Commitment Training Components in the Behavioral Intervention of Individuals with Autism and Developmental Disorders

Acceptance and commitment therapy (ACT) is a contemporary approach to dealing with unhelpful private events and improving psychological flexibility (Hayes et al., 2006) that is often used in psychotherapy (Szabo, 2019). Nonpsychotherapeutic uses of ACT have been referred to as acceptance and commitment training (ACTraining; Moran, 2011, 2015; Szabo, 2019), which refers to the use of one or more of six processes-present moment attention or mindfulness, values clarification, committed action, self-as-context, defusion, and acceptance (Hayes et al., 2006)-implemented outside of psychotherapeutic settings. There has been a recent increase in interest in ACTraining within the behavior-analytic community, which has led behavior analysts to question whether ACTraining is useful to the field of applied behavior analysis (ABA) and whether it is within the scope of practice of behavior analysts. Tarbox et al. (2020) proposed that the use of ACTraining is within the scope of practice of behavior analysts and aligns with the seven dimensions of ABA as outlined by Baer et al. (1968). The purpose of the current study was to provide a systematic review of single-case research designs that measure the behavioral effects of ACTraining components conducted with individuals with autism spectrum disorder or developmental disorders, their parents, and their staff, and to inform clinicians and researchers about what variables have been evaluated and what gaps still exist.