Personality disorder models and their coverage of interpersonal problems

Area of Science:

• Psychology
• Psychiatry
• Clinical Psychology

Background:

• Interpersonal dysfunction is a core feature of personality disorders (PDs).
• Comparing different personality disorder models is crucial for understanding and diagnosing PDs.
• Existing models vary in their coverage of interpersonal problems.

Purpose of the Study:

• To examine the interpersonal coverage of four competing personality disorder models.
• To compare the severity and style of interpersonal problems associated with each PD model.
• To assess how well different personality trait frameworks capture interpersonal dysfunction.

Main Methods:

• Utilized data from 628 psychiatric patients.
• Administered NEO Personality Inventory-3 First Half (NEO-PI-3FH), Personality Inventory for the DSM-5 (PID-5), Computerized Adaptive Test of Personality Disorder-Static Form (CAT-PD-SF), and Structured Clinical Interview for DSM-IV Personality Questionnaire (SCID-II PQ).
• Assessed interpersonal dysfunction using the Inventory of Interpersonal Problems-Short Circumplex (IIP-SC).

Main Results:

• Replicated previous findings regarding DSM-5 Section II and III models.
• Extraversion and Agreeableness facets showed the clearest interpersonal problem definitions across trait ranges.
• Pathological trait models better covered dominance problems, while normal-range traits better covered nonassertiveness.

Conclusions:

• Personality disorder models differ in their ability to describe interpersonal dysfunction.
• Normal-range personality traits and pathological trait models offer complementary coverage of interpersonal issues.
• Reconciling specific constructs across personality pathology descriptions requires further research.