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Published on August 6, 2007

Author: Sharck

Source: authorstream.com

Evaluating a Profile Similarity Approach to Personality Pathology:  Evaluating a Profile Similarity Approach to Personality Pathology Erika Carlson Wake Forest University The 4 P’s:  The 4 P’s Personality Profiles Pathology Prototypes Personality and Profiles:  Personality and Profiles Domain Facets NEO-PI-R score Elements of a personality profile:  Elements of a personality profile Scatter Shape Elevation Pathology & prototypes :  Pathology andamp; prototypes Categorical vs. Dimensional approach Normal personality Pathology Define pathology in terms of normal personality Lynam andamp; Widiger (2001) 10 expert-generated personality disorder prototypes Assessment Profile matching Prototype profile matching:  Prototype profile matching N E O A C Prototype profile matching:  Prototype profile matching What are the elements of profile similarity?:  What are the elements of profile similarity? Elements of profile similarity:  Elements of profile similarity Similar in elevation:  Similar in elevation Similar in scatter :  Similar in scatter Similar in shape:  Similar in shape Elements within an omnibus index: Intraclass correlation:  Shape Scatter andamp; Elevation andamp; Intraclass Correlation Elements within an omnibus index: Intraclass correlation x=profile y=prototype My research questions:  My research questions 1) How much information does each element of profile similarity provide in the context of personality disorders? 2) Does combining the 3 elements into one omnibus index obscure similarity information? Methods:  Methods Participants 219 Wake Forest University undergraduates in Introductory Psychology classes Measures Revised NEO Personality Inventory (NEO-PI-R) Normal personality (30 facets of the 5 domains) 240 items Millon Clinical Mulitaxial Inventory-III (MCMI) 10 DSM-IV personality disorder scales 175 items Methods :  Methods Step 1: Generate similarity elements from NEO-based profile correlation between participant’s profile and prototypes Shape index overall mean Elevation index overall variability Scatter index Step 2: Generate omnibus index from NEO-based profile intraclass correlations (ICC) between each participant’s profile and prototypes ICC index Question 1How much information does each element of profile similarity provide?:  Question 1 How much information does each element of profile similarity provide? Generated simultaneous regression equations for all 10 personality disorders (MCMI) Histrionic = Elevation + Scatter + Histrionic Shape Question 1How much information does each element of profile similarity provide?:  Question 1 How much information does each element of profile similarity provide? Personality Disorder Standard Regression Weights R2 βelevation βscatter βshape Histrionic .29*** .29*** -.02 .50*** (MCMI) Histrionic = Elevation + Scatter + Histrionic Shape Question 1How much information does each element of profile similarity provide?:  Question 1 How much information does each element of profile similarity provide? Personality Disorder Standard Regression Weights R2 βelevation βscatter βshape Schizoid .29*** -.20** .03 .50*** Avoidant .40*** -.12* .11† .64*** Dependent .30*** .05 -.01 .54*** Histrionic .29*** .29*** -.02 .50*** Narcissistic .37*** .01 .10 .60*** Antisocial .37*** -.11 -.03 .56*** Compulsive .51*** .28*** -.06 .63*** Schizotypal .30*** -.01 .17** .55*** Borderline .42*** .14* -.02 .68*** Paranoid .23*** -.09 .01 .46*** Mean .35 .02 .03 .57 * p andlt; .05 ** p andlt; .01 *** pandlt;.001 † pandlt;.10 Question 2Compare an omnibus index of profile similarity with elements:  Question 2 Compare an omnibus index of profile similarity with elements Generated 2 hierarchical regression models for each of the 10 personality disorders Predicting MCMI scale scores from the 3 elements and the ICC omnibus index Model 1- Predicting MCMI-III scale score: Step 1: three similarity elements Step 2: intraclass correlation Model 2- Predicting MCMI-III scale score: Step 1: intraclass correlation Step 2: three similarity elements Question 2Compare an omnibus index of profile similarity with elements:  Question 2 Compare an omnibus index of profile similarity with elements Model 1 Model 2 Step 1 Step 2 Step 1 Step 2 Indices R2 ICC R2 ΔR2 ICC R2 Indices R2 ΔR2 Schizoid .29*** .29*** .00 .28*** .32*** .04* Avoidant .40*** .40*** .00 .39*** .40*** .01 Dependent .30*** .31*** .00 .28*** .31*** .03* Histrionic .29*** .29*** .01 .21*** .30*** .09*** Narcissistic .37*** .41*** .04*** .35*** .41*** .06*** Antisocial .37*** .37*** .00 .36*** .37*** .01 Compulsive .51*** .51*** .01 .38*** .51*** .13*** Schizotypal .30*** .30*** .00 .25*** .30*** .06*** Borderline .43*** .43*** .00 .40*** .44*** .04** Paranoid .23*** .23*** .00 .23*** .23*** .00 Mean ΔR2 .01 .05 * p andlt; .05 ** p andlt; .01 *** pandlt;.001 † pandlt;.10 Question 2Compare an omnibus index of profile similarity with elements:  Question 2 Compare an omnibus index of profile similarity with elements Generated 2 hierarchical regression models for each of the 10 personality disorders Predicting MCMI scale scores from the SHAPE element and the ICC omnibus index Model 1- Predicting MCMI-III scale score: Step 1: SHAPE element Step 2: intraclass correlation Model 2- Predicting MCMI-III scale score: Step 1: intraclass correlation Step 2: SHAPE element Question 2Compare an omnibus index of similarity with SHAPE:  Question 2 Compare an omnibus index of similarity with SHAPE Model 1 Model 2 Step 1 Step 2 Step 1 Step 2 Shape R2 ICC R2 ΔR2 ICC R2 Shape R2 ΔR2 Schizoid .25*** .28*** .03** .28*** .31*** .03** Avoidant .38*** .39*** .01† .39*** .39*** .00 Dependent .30*** .31*** .01 .28*** .30*** .03** Histrionic .21*** .22*** .00 .21*** .22*** .00 Narcissistic .36*** .36*** .00 .35*** .36*** .01† Antisocial .35*** .36*** .01† .36*** .37*** .00 Compulsive .44*** .47*** .03*** .38*** .47*** .09*** Schizotypal .28*** .28*** .00 .25*** .28*** .03** Borderline .41*** .41*** .00 .40*** .41*** .01* Paranoid .22*** .23*** .01 .23*** .23*** .00 * p andlt; .05 ** p andlt; .01 *** pandlt;.001 † pandlt;.10 Implications:  Implications Profile similarity measures current methods Omnibus index vs. elements categorical vs. dimensional approach to pathology Assessment Limitations and Future Directions:  Limitations and Future Directions Limitation Non-clinical sample Future Directions Explore each element Replication Cohen’s D2 and other omnibus indices Slide26:  Thank you! Special thanks to: Dr. R. Michael Furr Kris Gauthier Richard King Paul Hussman Cluster A Prototypes :  Cluster A Prototypes Cluster B Prototypes:  Cluster B Prototypes Cluster C prototypes:  Cluster C prototypes Elements of profile similarity within omnibus measures:  Shape Scatter Elevation Cohen’s D2 Elements of profile similarity within omnibus measures

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