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Refining personality disorder subtypes and classification using finite mixture modeling.

Rebecca J Yun1, Barry L Stern2, Mark F Lenzenweger

  • 1Department of Psychology, Fairleigh Dickinson University.

Personality Disorders
|October 11, 2012
PubMed
Summary
This summary is machine-generated.

This study refines personality disorder (PD) classification using Kernberg's object relations model and finite mixture modeling. Findings support a PD taxonomy based on paranoid, aggressive, and antisocial features as a supplement to current diagnostic systems.

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Area of Science:

  • Psychology
  • Psychiatry
  • Clinical Psychology

Background:

  • Current Diagnostic and Statistical Manual of Mental Disorders (DSM) for Axis II disorders suffers from heterogeneity and poor discriminant validity, hindering accurate personality disorder (PD) diagnosis.
  • Alternative assessment tools are often used alongside the DSM, with Kernberg's object relational model being a popular framework.
  • Empirical studies and Kernberg's model provide a basis for refining PD taxonomy.

Purpose of the Study:

  • To clarify Kernberg's personality disorder (PD) taxonomy.
  • To identify subtypes within a sample with varying levels of personality pathology.
  • To evaluate the validity of the identified grouping structure using external measures.

Main Methods:

  • Utilized finite mixture modeling on a sample of 141 subjects representing a wide range of personality pathology.
  • Analyzed variables related to antisocial, paranoid, and aggressive features.
  • Evaluated the validity of the obtained solution using external measures.

Main Results:

  • Finite mixture modeling identified 3 distinct components within the analyzed variables.
  • Group 1: Low levels of antisocial, paranoid, and aggressive features.
  • Group 2: Elevated paranoid features; Group 3: Highest levels across the three variables.
  • External measures supported the validity of the identified grouping structure.

Conclusions:

  • Findings are congruent with previous research suggesting a PD taxonomy based on paranoid, aggressive, and antisocial features as a viable supplement to current diagnostic systems.
  • Kernberg's object relational model offers a plausible substantive aid in refining PD classification.
  • The study successfully identified subtypes within personality pathology, supporting the refinement of diagnostic systems.