The purpose of this review was to quantitatively synthesize studies using acceptance and commitment therapy (ACT) with individuals with neurodevelopmental disorders (NNDs), their parents, and staff members that support them. Thirty studies published in peer-reviewed journals between 2006 and 2020 met inclusion criteria. They were reviewed and coded on variables associated with participants’ characteristics, settings, dropouts, design type, ACT procedures and measures, social validity, treatment…
