The Impact of Event Scale – Revised (IES-R)

The Impact of Event Scale – Revised (IES-R) was designed as a measure of post-traumatic stress disorder (PTSD) symptoms, and is a short, easily administered self-report questionnaire. It can be used for repeated measurements over time to monitor progress and is best used for recent and specific traumatic events.


Weiss, D.S., & Marmar, C.R. (1997). The Impact of Event Scale-Revised. In J.P. Wilson, & T.M. Keane (Eds.), Assessing Psychological Trauma and PTSD: A Practitioner’s Handbook (pp. 399-411). New York: Guilford Press.The original Impact of events Scale (IES) was developed in the 1980s