The mediating role of the metacognition, time perspectives and experiential avoidance on the relationship between childhood trauma and post-traumatic stress disorder symptoms.

: The current study was designed to investigate the direct and indirect effects of the childhood trauma, metacognition, time perspectives and experiential avoidance in prediction of post-traumatic stress disorder (PTSD) symptoms. : Participants included 432 adult patients referred for treatment to psychological, psychiatric disorders clinics and medical clinics of Shiraz, Iran. They were exposed to a traumatic event according to criterion A in the Diagnostic and Statistical Manual of Mental Disorders fifth edition (DSM-V). Childhood Trauma Questionnaire (CTQ), Post-traumatic Checklist for DSM-5 (PCL-5), Zimbardo Time Perspective Inventory (ZTPI), Acceptance and Action Questionnaire - II (AAQ-II) and metacognitions questionnaire-30 (MCQ-30) all were applied for data collection. : The results indicated that childhood trauma has a direct correlation with symptoms of PTSD, metacognition, and time perspectives, while it has an indirect correlation with experiential avoidance as well as symptoms of PTSD. Thus, metacognition and time perspectives play a mediating role between childhood trauma and experiential avoidance. In the same way, all three variables (metacognition, time perspectives, and experiential avoidance) play the same role between childhood trauma and symptoms of PTSD. : Altogether, results of this study were consistent with the metacognitive model as well as Time Perspective Theory for PTSD and emphasizes that childhood trauma, metacognition, time perspectives and experiential Avoidance are important in explanation of PTSD symptoms.