Abstract
The effectiveness of the MMPI-2 in the detection of posttraumatic stress (PTS) symptomatology was investigated. Forty-nine veterans at a VA posttraumatic stress clinic were evaluated for PTS symptomatology according to DSM-III-R criteria. The ability of the MMPI-2 to differentiate between Vietnam combat veterans (VCV) who met DSM-III-R criteria for posttraumatic stress disorder (PTSD; N = 36) and those who reported varying levels of posttraumatic stress symptoms (PTSS; N = 13) was examined. Overall, the MMPI-2 was effective in differentiating between the two groups of veterans. Of the 15 MMPI-2 scales used to evaluate PTS symptomatology, 12 significantly differentiated veterans with PTSD from those with PTSS. Diagnostic efficiency statistics for the MMPI-2 PTSD scales (PS and PK) were calculated at four cutoff points (T ≥ 65, ≥70, ≥75, and ≥80). The PS Scale was the most robust and effective index in differentiating between veterans with PTSD and those with PTSS. Implications for the assessment of varying degrees of PTS are discussed.
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