Date of Award

Summer 2015

Document Type

Dissertation

Degree Name

Doctor of Psychology (PsyD)

Department

Psychology

Committee Director

Richard Handel

Committee Member

Robert Archer

Committee Member

Disideria Hacker

Committee Member

Serina Neumann

Committee Member

James Paulson

Abstract

The Minnesota Multiphasic Personality Inventory – 2 Restructured Form (MMPI-2- RF; Tellegen & Ben-Porath, 2008/2011) is a widely used self-report measure of psychopathology and personality. However, the self-report format of the MMPI-2-RF suggests that interpretation of its scales and the clinical recommendations that follow are vulnerable to invalid response styles. This dissertation builds upon previous research (Handel, Ben-Porath, Tellegen, & Archer, 2010) to examine the effect of random and fixed responding, as measured by the VRIN-r and TRIN-r Scales, on the 28 SP and PSY-5 Scales. A computer simulation procedure was used to insert increasing degrees of inconsistent responding into protocols from two large samples (N = 2, 276 and N = 704). Results indicated that increasing degrees of inconsistent responding increase SP and PSY-5 Scale mean T-scores and weaken external criterion validity. Further, certain SP and PSY-5 Scales evidenced large changes in mean T-scores at relatively low levels of simulated inconsistent responding. Implications of these results and future areas of investigation are discussed.

ISBN

9781339010021

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