The Trauma History Screen (THS) (Carlson et al., 2011) The THS is a 14-item self-report measure assessing exposure to trauma in adults. The THS can be used as a screening tool. The THS has not been used with adolescents, nor does a separate adolescent version exist. The THS consists of two parts. In part one, questions probe for traumatic events (e.g., “a really bad car, boat, train or aeroplane accident”) and the number of times the event(s) occurred. Respondents indicate “yes” or “no” and the number of times the event occurred. In part two, respondents can provide further details about endorsed events (Carlson et al., 2011). This measure was designed to be administered in about 4 minutes (Carlson et al., 2011). The THS demonstrates adequate test-retest reliability over a period of one to two weeks ( k = .61 -.77; Carlson et al., 2011) and concurrent validity with the Traumatic Life Events Questionnaire (TLEQ; Kubany et al., 2000). The measure is available online ( http://www.istss.