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The Essential Features of Personality Disorder in DSM-5: The Relationship Between Criteria A and B

Abstract The essential features of the general criteria for personality disorder in the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5), are based on impairments in self and interpersonal functioning (criterion A) and pathological personality traits (criterion B). The current study investigated the relationship between criteria A and B in a German psychiatric sample (N = 149). Criterion A was measured by the General Assessment of Personality Disorder (GAPD); criterion B, by the Dimensional Assessment of Personality Pathology (DAPP) and the Revised NEO Personality Inventory (NEO-PI-R). There was a significant relationship between the GAPD, the DAPP, and the NEO-PI-R. The DAPP and NEO-PI-R domains increased the predictive validity of the GAPD (by 7.5% and 14.6%, respectively). The GAPD increased the variance explained by the DAPP by 1.5% and by the NEO-PI-R by 6.5%. The results suggest a substantial relationship between criteria A and B. Criterion B shows incremental validity over criterion A but criterion A only in part over criterion B. Future research should investigate whether it is possible to assess functional impairment apart from personality traits.