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An Evaluation of the Incremental Validity of the MMPI-2 Superlative (S) Scale in an Inpatient Psychiatric Sample

Robert P. Archer

Eastern Virginia Medical School

Richard W. Handel

Eastern Virginia Medical School

Barbara Couvadelli

University of North Texas

The MMPI-2 Superlative (S) scale was developed by Butcher and Han (1995) to assess individuals’ tendencies to present themselves in an unrealistically positive light. The current study examined the performance of the L, K, and S scales in accurately distinguishing the MMPI-2 profiles of 379 psychiatric inpatients who produced one or more elevations on the basic scale profiles, from 82 psychiatric inpatients who produced no clinical range elevation on any of the eight basic clinical scales (excluding scales 5 and 0). The findings from the present study indicate that the S scale appears to be effective in the identification of defensiveness among psychiatric inpatients, with mean effect sizes in the moderate to large range. The optimal T-score cutoff for identifying defensive responders was 70 for both men and women. Further, results of hierarchical regression analyses showed that the S scale added incrementally to the prediction levels achieved by the optimal combination of the L and K scales.

Key Words: MMPI-2 • defensiveness • Superlative Scale • incremental validity

Assessment, Vol. 11, No. 1, 102-108 (2004)
DOI: 10.1177/1073191103257396
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