IES-R - Impact of Events Scale - Revised

The Impact of Event Scale–Revised (IES-R) is a 22-item self-report measure designed to assess subjective distress associated with a specific traumatic or stressful event. It evaluates three areas of posttraumatic stress: intrusion, avoidance, and hyperarousal. Respondents rate how much they have been distressed or bothered by each symptom during the previous seven days. The IES-R is commonly used in clinical and research settings to assess trauma-related symptoms and monitor changes in symptom severity. It is based on DSM-IV PTSD symptom concepts and has not been updated to fully reflect DSM-5 diagnostic criteria.