Prevention of Post Traumatic Stress Disorder Following Trauma by Attention Control Training

The purpose of this study is to explore the efficacy of Attention Control Training in preventing the development of Post Traumatic Stress Disorder (PTSD), during the period near after a traumatic event and before PTSD is develop. Individuals who underwent a traumatic event in the past two weeks will be randomly assigned to either Attention Control Training (ACT), designed to normalize threat-related attention biases or a control conditions: without intervention at all. Outcome measures will be a diagnosed of PTSD and the level of severity of symptoms derived from the Clinician Administered PTSD Scale (CAPS-5), after 3 month since the traumatic event had occurred. The investigators expected to find lower ratios of PTSD symptoms in the ACT condition relative to the control condition in which no symptomatic relief is expected.