Diagnostic accuracy of the MMPI-2 malingering discriminant function index in the detection of malingering among inmates

Jarrod S. Steffan, Robert D. Morgan

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The MMPI-2 Malingering Discriminant Function Index (M-DFI) was designed to detect malingerers educated about MMPI-2 validity indicators. However, given current attorney practices, the clinical utility of the M-DFI lies in its ability to detect examinees who are cautioned about the indicators. In this study, we compared 45 inmate simulators cautioned to avoid detection on the MMPI-2 with 46 psychiatric inmates who completed the MMPI-2 under standard instructions. Logistic regression analyses indicated that although the M-DFI performed better than several individual indicators, results were mixed for combinations of indicators, and the M-DFI did not outperform different sets of existing indicators. These findings support existing strategies to detect malingering on the MMPI-2. We discuss considerations concerning the clinical applicability of M-DFI.

Original languageEnglish
Pages (from-to)392-398
Number of pages7
JournalJournal of Personality Assessment
Volume90
Issue number4
DOIs
StatePublished - Jul 2008

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