Dysfunctional beliefs discriminate personality disorders

Area of Science:

• Psychology
• Psychiatry
• Clinical Psychology

Background:

• Cognitive theory posits that dysfunctional beliefs underpin personality disorders (PDs).
• Previous research has explored the link between beliefs and PDs, but specific associations require further investigation.

Purpose of the Study:

• To examine if distinct sets of dysfunctional beliefs are differentially associated with five specific personality disorders.
• To test predictions derived from cognitive theory regarding the relationship between beliefs and PDs.

Main Methods:

• Seven hundred fifty-six psychiatric outpatients completed the Personality Belief Questionnaire (PBQ).
• Patients were assessed for personality disorders using a standardized clinical interview by blinded assessors.
• Statistical analyses were used to determine associations between PBQ beliefs and diagnosed PDs.

Main Results:

• Patients with avoidant, dependent, obsessive-compulsive, narcissistic, and paranoid PDs showed preferential endorsement of PBQ beliefs theoretically linked to their respective disorders.
• The findings provide empirical support for the cognitive theory of personality disorders.

Conclusions:

• The study validates the cognitive model for understanding personality disorders.
• The Personality Belief Questionnaire (PBQ) demonstrates clinical utility for assessing personality-disordered patients.
• Future research should further explore the PBQ's applications and refine cognitive-behavioral interventions for PDs.