Impact of Event Scale-Revised

Impact of Event Scale-Revised


The Impact of Event Scale-Revised (IES-R) is a self-report measure of current subjective distress in response to a specific traumatic event. The 22-item scale is comprised of 3 subscales representative of the major symptom clusters of post-traumatic stress: intrusion, avoidance, and hyperarousal. The IES-R is a revised version of the Impact of Event Scale and was developed as the original version did not include a hyperarousal subscale. IES-R responses were also modified so the client was requested to report on the degree of distress rather than the frequency of the symptoms.


Post-Traumatic Stress


Self administered

Assessment type


Assessment modes



12 years and above

Estimated time

Approximately 10 minutes


Weiss, D. S. & Marmar, C. R. (1996).The Impact of Event Scale-Revised. In J. Wilson & T. M. Keane (Eds.), Assessing psychological trauma and PTSD (pp. 399–411). New York: Guilford Press.