• Examining Validity Characteristics of the MMPI-2 PSY-5 Psychoticism Scale

      Covarrubias, Enrique G. (2010-09-21)
      The purpose of this study is to firmly establish the facet scales of the Personality Psychopathology Five (PSY-5) Psychoticism scale of the Minnesota Multiphasic Personality Inventory-Second Edition (MMPI-2). Arnau, Handel, and Archer (2005) recently developed facet scales for the MMPI-2 PSY-5 scales using principal component analyses. The results of this study and the original published study were compared to determine if similar facet scales are found for the MMPI-2 PSY-5 Psychoticism scale. Participants were drawn from three different samples: the MMPI-2 normative sample, an inpatient sample from a mid-Atlantic region, and a college sample from a Midwestern university. Item-level principal component analyses and factor analyses were utilized to determine which scales yield better clinical utility. Although the results show some consistency in the MMPI-2 PSY-5 Psychoticism facet scales between the current and original study, differences were noted which indicate that the psychometric properties of the facet scales have yet to be empirically established. Clinical and research implications for the facet scales are discussed.