Implications of these results and future areas of investigation are discussed. Further, certain SP and PSY-5 Scales evidenced large changes in mean T-scores at relatively low levels of simulated inconsistent responding. Results indicated that increasing degrees of inconsistent responding increase SP and PSY-5 Scale mean T-scores and weaken external criterion validity. RESULTS: Valid EI patients scored significantly higher than the MMPI-2-RF normative sample on several validity scales with the largest effect sizes on F-r (Infrequent Responses), Fs (Infrequent Somatic Responses), FBS-r (Symptom Validity), and RBS (Response Bias), and 33 obtaining elevated scores on these scales per standard interpretive. 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). 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. 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. Summary: The MMPI-2-RFs Validity Scales classification accuracy of Malingered Neurocognitive Dysfunction improved when multiple scales were interpreted. 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.
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