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Dimensions of personality pathology: an alternative to the five-factor model.

OBJECTIVE
Researchers have advocated replacing the DSM-IV classification of personality disorders with an alternative diagnostic system based on the five-factor model. This study evaluates the clinical comprehensiveness of the five-factor model and addresses the broader question of how many factors, and which factors, are necessary to understand personality pathology.


METHOD
A national sample of 530 psychiatrists and clinical psychologists used the Shedler-Westen Assessment Procedure (SWAP-200) to provide detailed psychological descriptions of patients with personality disorder diagnoses. The SWAP-200 is a 200-item instrument designed to capture the richness and complexity of clinical observations while also providing quantifiable data for research. We used factor analysis to identify dimensions of personality relevant to understanding personality pathology.


RESULTS
The five-factor structure replicated in a content-restricted subset of 60 SWAP-200 items. However, factor analysis of the full SWAP-200 yielded a conceptually richer factor solution that did not resemble the five-factor model. The analysis identified 12 clinically relevant personality dimensions labeled psychological health, psychopathy, hostility, narcissism, emotional dysregulation, dysphoria, schizoid orientation, obsessionality, thought disorder, oedipal conflict (histrionic sexualization), dissociation, and sexual conflict.


CONCLUSIONS
The five-factor model represents a sound distillation of the personality constructs used by laypersons. However, it omits key clinical constructs and may not capture the complexity of personality syndromes seen in clinical practice. The SWAP-200 factors may provide a framework for studying personality pathology that is both empirically grounded and clinically relevant.