Introduction: Avoidance, intrusions, and hyperarousal are common symptoms in people with PTSD (Post-traumatic stress disorder). In this study, the effectiveness of holographic reprocessing treatment, which is an evidence-based treatment in these patients, will be investigated so that in the future it can be used in therapeutic settings to reduce the symptoms of this mental disorder. Materials and Methods: The research method was semi-experimental and based on the pretest-posttest control group design, with follow-up after three months. The sample included 42 participants who were selected by a purposeful sampling method and placed randomly in the experimental and control groups. At first, at the same time, and in the same conditions, all the participants responded to the Posttraumatic Stress Disorder Checklist (PCL-5). Structured Clinical Interview for DSM Disorders (SCID-5) was used for people who scored 31 or higher. Event Scale-Revised questionnaire (ESR) was also used. The holographic reprocessing therapy (HR) was performed for the experimental group. In the end, both groups were evaluated by posttests, and then they were tracked after an interval of three months. In order to analyze data, ANCOVA and MANCOVA tests were applied through SPSS 22. Results: Findings showed that HR was meaningfully effective in decreasing avoidance, intrusions, and hyperarousal symptoms (p<0.01) and after three months, no significant changes were found in the results. Conclusions: While HR coincided with reductions in avoidance, intrusions, and hyperarousal symptoms in PTSD patients, more research with larger samples is needed to further examine the effectiveness of this treatment on these patients.
Keywords: Avoidance Learning, Intrusions, PTSD, Arousal.