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  • Title: Psychometric properties of the Posttraumatic Stress Disorder Symptom Scale Interview for DSM-5 (PSSI-5).
    Author: Foa EB, McLean CP, Zang Y, Zhong J, Rauch S, Porter K, Knowles K, Powers MB, Kauffman BY.
    Journal: Psychol Assess; 2016 Oct; 28(10):1159-1165. PubMed ID: 26691507.
    Abstract:
    Changes to the diagnostic criteria for posttraumatic stress disorder (PTSD) in the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) create a need for valid and reliable updated assessment tools. This study examined key psychometric properties (e.g., internal consistency, test-retest reliability, interrater reliability, and convergent and discriminant validity) of the PTSD Symptom Scale Interview for DSM-5 (PSSI-5), a modified version of the PSS-I (PTSD Symptom Scale)-Interview Version for the DSM-IV. Participants were 242 urban community residents, veterans, and college undergraduates, recruited from 3 study sites, who had experienced a DSM-5 Criterion A traumatic event. The PSSI-5 demonstrated good internal consistency (α = .89) and test-retest reliability (r = .87), as well as excellent interrater reliability for the total severity score (intraclass correlation = .98) and interrater agreement for PTSD diagnosis (κ = .84). The PSSI-5 also demonstrated convergent validity with 3 measures of PTSD (i.e., Clinician-Administered PTSD Scale for DSM-5, Posttraumatic Diagnostic Scale for DSM-5, and PTSD Checklist-Specific Version; all rs > .72) and discriminant validity with the Beck Depression Inventory-II and the State-Trait Anxiety Inventory-Trait scale. Receiver operating characteristic analysis yielded a cutoff score of 23 for identifying a probable PTSD diagnosis. Together, these findings indicate that the PSSI-5 is a valid and reliable instrument for assessing PTSD diagnosis and severity. (PsycINFO Database Record
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