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Personality disorders and the interpersonal octagon.

J Birtchnell¹, J Shine

¹Institute of Psychiatry, London, UK.

The British Journal of Medical Psychology

|January 5, 2001

Summary

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The interpersonal octagon model effectively maps personality disorders, with the Person's Relating to Others Questionnaire--Revised Version (PROQ2) showing strong correlations. This study validates the PROQ2's utility in understanding personality disorder tendencies.

Area of Science:

Psychology
Psychiatry
Personality Disorders

Background:

The interpersonal octagon is a theoretical framework for understanding interpersonal tendencies.
The Person's Relating to Others Questionnaire--Revised Version (PROQ2) was developed to measure these tendencies.
Validating the placement of personality disorders within this model is crucial for clinical application.

Purpose of the Study:

To test the validity of the interpersonal octagon model by examining the placement of 10 DSM-IV personality disorders.
To assess the efficacy of the PROQ2 in measuring interpersonal relating tendencies within this theoretical structure.

Main Methods:

Administered the PROQ2 and the DSM-IV Personality Diagnostic Questionnaire (PDQ-IV) to 107 male prisoners.
Analyzed intercorrelations between PROQ2 and PDQ-IV scale scores.

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Compared PROQ2 scores of prisoners with those of male students and psychotherapy patients.

Main Results:

PROQ2 scores for prisoners were intermediate between student and psychotherapy patient groups.
High intercorrelations were observed between PROQ2 and PDQ-IV scales, and total scores.
All personality disorders showed high correlation with the 'lower close' scale of the PROQ2, with varying degrees of correspondence to predicted locations.

Conclusions:

The PROQ2 demonstrates validity in measuring interpersonal relating tendencies relevant to personality disorders within the interpersonal octagon framework.
The study provides empirical support for the proposed locations of most DSM-IV personality disorders within the interpersonal octagon.
Further research may refine the placement of certain disorders and explore discrepancies.