Effects of acceptance and commitment therapy on trauma-related symptoms: A systematic review and meta-analysis.

Objective: Acceptance and commitment therapy (ACT) is a third-wave cognitive behavioral therapy that has shown promise as an effective treatment for reducing trauma-related symptoms. Although there have been systematic reviews on the clinical effectiveness of ACT for posttraumatic stress disorder, there are no known meta-analyses published on the impact of ACT in adult populations with trauma-related symptoms. Hence, the purpose of this meta-analysis and systematic review was to update the literature and assess the effectiveness of ACT interventions for decreasing trauma-related distress in adults who have developed trauma symptoms following exposure to one or more traumatic events.