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Beyond Rare-Symptoms Endorsement: a Clinical Comparison Simulation Study Using the Minnesota Multiphasic Personality Inventory-2 (MMPI-2) with the Inventory of Problems-29 (IOP-29)

Journal Article


Abstract


  • To date, the MMPI-based, rare-symptom detection strategy is considered one of the most effective ones in symptom validity assessment. Because many of the items of the Inventory of Problems-29 (IOP-29) were designed specifically to provide incremental validity over the MMPI F scales, this study tested whether using the IOP-29 in combination with the MMPI-2 would provide higher classification accuracy compared to using either instrument alone. A total of 155 Italian adult individuals contributed to this study. About half (n = 93) were experimental malingerers (expMAL) instructed to simulate depression without being detected as feigners. The others were either (a) depressed patients in treatment (n = 36) or (b) individuals evaluated for possible malingering associated with work-related stress and considered to be genuinely affected by depression (n = 26). All were administered the Italian versions of both the MMPI-2 and the IOP-29. As expected, both instruments were highly effective in discriminating feigned from bona fide depression, with AUC values ranging from.77 to.90. More importantly, when entering the IOP-29 after each of the MMPI-2 scales under consideration (i.e., F, Fb, and Fp), the logistic regression models predicting group membership (0 = patient; 1 = expMAL) improved significantly. Likewise, each of the three MMPI-2 scales under consideration also significantly improved the prediction of group membership, when entered after the IOP-29. These findings thus indicate that using the MMPI-2 together with the IOP-29 could provide incremental validity over using either instrument alone, when testing depression-related complaints.

UOW Authors


  •   Giromini, Luciano (external author)
  •   Lettieri, Sharon Carfora (external author)
  •   Zizolfi, Salvatore (external author)
  •   Zizolfi, Daniele (external author)
  •   Viglione, Donald J. (external author)
  •   Brusadelli, Emanuela
  •   Perfetti, Barbara (external author)
  •   Di Carlo, Daniela Angiola (external author)
  •   Zennaro, Alessandro (external author)

Publication Date


  • 2019

Citation


  • Giromini, L., Lettieri, S. Carfora., Zizolfi, S., Zizolfi, D., Viglione, D. J., Brusadelli, E., Perfetti, B., di Carlo, D. & Zennaro, A. (2019). Beyond Rare-Symptoms Endorsement: a Clinical Comparison Simulation Study Using the Minnesota Multiphasic Personality Inventory-2 (MMPI-2) with the Inventory of Problems-29 (IOP-29). Psychological Injury And Law, 12 212-224.

Scopus Eid


  • 2-s2.0-85067023403

Number Of Pages


  • 12

Start Page


  • 212

End Page


  • 224

Volume


  • 12

Place Of Publication


  • United States

Abstract


  • To date, the MMPI-based, rare-symptom detection strategy is considered one of the most effective ones in symptom validity assessment. Because many of the items of the Inventory of Problems-29 (IOP-29) were designed specifically to provide incremental validity over the MMPI F scales, this study tested whether using the IOP-29 in combination with the MMPI-2 would provide higher classification accuracy compared to using either instrument alone. A total of 155 Italian adult individuals contributed to this study. About half (n = 93) were experimental malingerers (expMAL) instructed to simulate depression without being detected as feigners. The others were either (a) depressed patients in treatment (n = 36) or (b) individuals evaluated for possible malingering associated with work-related stress and considered to be genuinely affected by depression (n = 26). All were administered the Italian versions of both the MMPI-2 and the IOP-29. As expected, both instruments were highly effective in discriminating feigned from bona fide depression, with AUC values ranging from.77 to.90. More importantly, when entering the IOP-29 after each of the MMPI-2 scales under consideration (i.e., F, Fb, and Fp), the logistic regression models predicting group membership (0 = patient; 1 = expMAL) improved significantly. Likewise, each of the three MMPI-2 scales under consideration also significantly improved the prediction of group membership, when entered after the IOP-29. These findings thus indicate that using the MMPI-2 together with the IOP-29 could provide incremental validity over using either instrument alone, when testing depression-related complaints.

UOW Authors


  •   Giromini, Luciano (external author)
  •   Lettieri, Sharon Carfora (external author)
  •   Zizolfi, Salvatore (external author)
  •   Zizolfi, Daniele (external author)
  •   Viglione, Donald J. (external author)
  •   Brusadelli, Emanuela
  •   Perfetti, Barbara (external author)
  •   Di Carlo, Daniela Angiola (external author)
  •   Zennaro, Alessandro (external author)

Publication Date


  • 2019

Citation


  • Giromini, L., Lettieri, S. Carfora., Zizolfi, S., Zizolfi, D., Viglione, D. J., Brusadelli, E., Perfetti, B., di Carlo, D. & Zennaro, A. (2019). Beyond Rare-Symptoms Endorsement: a Clinical Comparison Simulation Study Using the Minnesota Multiphasic Personality Inventory-2 (MMPI-2) with the Inventory of Problems-29 (IOP-29). Psychological Injury And Law, 12 212-224.

Scopus Eid


  • 2-s2.0-85067023403

Number Of Pages


  • 12

Start Page


  • 212

End Page


  • 224

Volume


  • 12

Place Of Publication


  • United States