Impact of Event Scale-Revised (IES-R) (Weiss & Marmar, 1997). The IES-R is a 22-item self-report measure assessing stress associated with the experience of traumatic events in adults. The IES-R can be used as a screening tool. The IES-R has been used in several studies with adolescents (e.g. Xia & Ding, 2011) and a separate adolescent version exists (CRIES-13, Smith, Perrin, Dyregrov, & Yule, 2003). The IES-R consists of three subscales: Intrusion, Avoidance, and Hyperarousal. Sample items include, “Pictures appeared in my mind,” “I tried not to talk about it,” and “I was jumpy and easily startled.” Each item is rated on a 5-point Likert scale from zero (“not at all”) to four (“extremely”). The IES-R demonstrates excellent internal consistency for the total score (α = .96), and good to excellent internal consistency for the subscales ( r =.87-.94; Creamer, Bell, & Failla, 2003). It also demonstrates high concurrent validity with the Posttraumatic Stress Disorder (PTS

  Impact of Event Scale-Revised (IES-R; Weiss & Marmar, 1997). The IES-R is a 22-item self-report measure assessing stress associated with the experience of traumatic events in adults. The IES-R can be used as a screening tool (Orsillo, 2001). The IES-R has been used in several studies with adolescents (e.g. Xia & Ding, 2011) and a separate adolescent version exists (CRIES-13, Smith, Perrin, Dyregrov, & Yule, 2003). The IES-R consists of three subscales: Intrusion, Avoidance, and Hyperarousal. Sample items include, “Pictures appeared in my mind,” “I tried not to talk about it,” and “I was jumpy and easily startled.” Each item is rated on a 5-point Likert scale from zero (“not at all”) to four (“extremely”). The IES-R demonstrates excellent internal consistency for the total score (α = .96), and good to excellent internal consistency for the subscales ( r =.87-.94; Creamer, Bell, & Failla, 2003). It also demonstrates high concurrent validity with the Posttraumatic Stres