Eccentricity dimension of the Dimensional Clinical Personality Inventory: Review and psychometric properties

Lucas De Francisco Carvalho,Jonatha Tiago Bacciotti,Fernando José Silveira,Giselle Pianowski,Philipe Gomes Vieira

doi:10.5935/1678-4669.20160035

Abstract

Abstract We aimed to review of the Eccentricity dimension of the Dimensional Clinical Personality Inventory (IDCP), through two steps. The first one focused on developing new items and the second on testing the psychometric properties in a sample of 225 subjects (70.1% females), aging between 18 and 66 years, mostly undergraduate students (58.9%). The subjects answered the IDCP, and the Brazilian versions of the NEO-PI-R, PID-5 and MIS. The first step resulted in 42 items, which 22 were new. The second step resulted in a composite of 18 items, pooled in six interpretable factors, as Interpersonal detachment, Eccentric style, Paranormality, Persecutory style, Depersonalization and Emotional inexpressiveness, with internal consistency coefficients of .85 for the total score, and between .60 and .82 for the factors. The correlations between instruments revealed consistent and expected relations. The data suggested adequacy of the new Eccentricity dimension of IDCP.

Highlights

We aimed to review of the Eccentricity dimension of the Dimensional Clinical Personality Inventory (IDCP), through two steps
This study aimed to review the Eccentricity dimension of Inventário Dimensional Clínico da Personalidade (IDCP), through the development of new items based on prominent literature, and by testing the psychometric properties of the revised version
The Step 1, focused on developing new items for the Eccentricity dimension of IDCP, resulted in 652 new items related to 75 sentences listed as relevant for the dimension

Summary

Introduction

We aimed to review of the Eccentricity dimension of the Dimensional Clinical Personality Inventory (IDCP), through two steps. Regarding the assessment of diagnostic criteria that give base to personality disorders, such compliance to the DSM-5 proposal seems not considered in the previously available instruments for professional use in the Brazilian context This limitation can compromise the national clinical practice and the Brazilian participation on international exchange of researches in personality assessment. The IDCP consists of an assessment instrument with twelve dimensions measuring personality traits in pathological levels (Dependency, Aggressiveness, Mood Instability, Eccentricity, Attention Seeking, Distrust, Grandiosity, Isolation, Criticism Avoidance, Self-sacrifice, Conscientiousness and Impulsiveness) developed based on the DSM-IV-TR diagnostic criteria (APA, 2003b) and the pathological personality characteristics present in the theory of Theodore Millon (Millon, Grossman, & Tringone, 2010; Millon, Millon, Meagher, Grossman, & Ramnath, 2004)

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