Refinement of the MMPI-2 F(p) scale is not necessary a response to gass and luis

Paul A Arbisi, Yossef S. Ben-Porath, John McNulty

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Gass and Luis (2001) reported that four MMPI-2 Lie scale items contained on the F(p) scale do not measure symptom exaggeration but measure defensiveness. They hold that elimination of the four Lie scale items improves the utility of the F(p) scale in the identification of exaggeration in VA samples. To directly address the assertion that removal of the L scale items from the F(p) scale enhances the predictive validity ofF(p), data derived from a previously published study where 74 psychiatric inpatients were asked to retake the MMPI-2 and either feign psychopathology or respond in an honest manner were reanalyzed. The intact F(p) scale demonstrated a stronger correlation with group membership, increased incremental validity, and superior classification rates compared with the F(p) scale without the 4 Lie scale items. Consequently, the F(p) refinement recommended by Gass and Luis is unnecessaiy.

Original languageEnglish (US)
Pages (from-to)123-128
Number of pages6
Issue number2
StatePublished - Jan 1 2003


  • MMPI-2 F(p)
  • Malingering
  • Scale refinement


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