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Principal Components Analyses of the MMPI-2 PSY-5 Scales

Identification of Facet Subscales

Randolph C. Arnau

University of Southern Mississippi, Randolph.Arnau{at}usm.edu

Richard W. Handel

Eastern Virginia Medical School

Robert P. Archer

Eastern Virginia Medical School

The Personality Psychopathology Five (PSY-5) is a five-factor personality trait model designed for assessing personality pathology using quantitative dimensions. Harkness, McNulty, and Ben-Porath developed Minnesota Multiphasic Personality Inventory-2 (MMPI-2) scales based on the PSY-5 model, and these scales were recently added to the standard MMPI-2 profile. Although the PSY-5 constructs are multidimensional in definition, explicit subscales for the broader PSY-5 scales have not been developed. The primary goals of this study were to empirically derive subscales for the MMPI-2 PSY-5 scales using principal components analysis (PCA) and to replicate these subscales with an independent sample. Individual PSY-5 scales were analyzed using PCA with an initial sample of 4,325 MMPI-2 protocols, and the component structure was replicated with a second sample of 4,277 MMPI-2 protocols. A third sample of 4,327 protocols was used to further evaluate the internal consistency reliabilities of the resulting facet subscales. Overall, replicable facet subscales were identified with content areas that are largely congruent with Harkness and McNulty’s model.

Key Words: personality assessment • MMPI-2 • PSY-5 • psychometrics • scale development • principal components analysis

Assessment, Vol. 12, No. 2, 186-198 (2005)
DOI: 10.1177/1073191105274750
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