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Dysfunctional cognitions in personality pathology: the structure and validity of the Personality Belief Questionnaire

Published online by Cambridge University Press:  13 September 2011

J. C. Fournier*
Affiliation:
Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
R. J. DeRubeis
Affiliation:
Department of Psychology, University of Pennsylvania, Philadelphia, PA, USA
A. T. Beck
Affiliation:
Department of Psychiatry, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
*
*Address for correspondence: J. C. Fournier, Ph.D., University of Pittsburgh School of Medicine, 3811 O'Hara St., Pittsburgh, PA 15213, USA. (Email: fournierjc@upmc.edu)

Abstract

Background

This study examines the structure of the Personality Belief Questionnaire (PBQ), a self-report instrument designed to assess dysfunctional beliefs associated with personality pathology, as proposed by the cognitive theory of personality dysfunction.

Method

The PBQ was examined using exploratory factor analysis (EFA) with responses from 438 depressed out-patients, and confirmatory factor analysis (CFA) with responses from 683 treatment-seeking psychiatric out-patients. All participants were assessed for personality disorder (PD) using a standard clinical interview. The validity of the resulting factor structure was assessed in the combined sample (n=1121) by examining PBQ scores for patients with and without PD diagnoses.

Results

Exploratory and confirmatory analyses converged to indicate that the PBQ is best described by seven empirically identified factors: six assess dysfunctional beliefs associated with forms of personality pathology recognized in DSM-IV. Validity analyses revealed that those diagnosed with a PD evidenced a higher average score on all factors, relative to those without these disorders. Subsets of patients diagnosed with specific DSM-IV PDs scored higher, on average, on the factor associated with their respective diagnosis, relative to all other factors.

Conclusions

The pattern of results has implications for the conceptualization of personality pathology. To our knowledge, no formal diagnostic or assessment system has yet systematically incorporated the role of dysfunctional beliefs into its description of personality pathology. The identification of dysfunctional beliefs may not only aid in case conceptualization but also may provide unique targets for psychological treatment. Recommendations for future personality pathology assessment systems are provided.

Type
Original Articles
Copyright
Copyright © Cambridge University Press 2011

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