Efficacy of MMPI-2 validity scales and MCMI-II modifier scales for detecting spurious PTSD claims: F, F-K, fake bad scale, ego strength, subtle-obvious subscales, DIS, and DEB

Abstract

This study compared 119 personal injury claimants' scores on MMPI-2 and MCMI-II malingering scales. Data from 55 pseudo-PTSD patients and 64 controls confirm the utility of the scales examined. The following cut-offs were most effective for identifying spurious PTSD: F greater than 62, F-K = greater than -4, Es = greater than 30, FBS = greater than 24 (men), FBS = greater than 26 (women), total obvious minus subtle = greater than 90, DIS = greater than 60, and DEB = greater than 60. Pseudo-PTSD patients were those who (1) claimed to be suffering a psychological injury (2) that was so severe that it was disabling (3) due to an experience that was entirely implausible as a candidate for PTSD criterion A in DSM-III-R and (4) scored T = 65 or higher on both PK and PS, the post-traumatic stress disorder subscales of the MMPI-2.

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