Abstract
The present paper explores personality disorder from a biopsychosocial and developmental perspective, in particular, while considering forensic applications. It reviews criticisms of the current approach to classification, especially about its categorical in nature. Then, the paper focuses on the Five-Factor Model of personality dimensions and the attempts to relate it to understanding and assessing personality disorder (Costa and Widiger 2002). Developmental research is revealing that from early in life, temperament and personality seem to conform to a five-factor structure akin to the Big Five, although there are exceptions. Next, the paper examines the biopsychosocial model of personality and considers how personality disorder in the healthcare context affects treatment, relations with providers, and so on. Lastly, the paper examines Young’s (1997) stage model of development in relation to the Big Five and shows how the manner in which it deals with the development of the self may facilitate understanding of personality development and its disturbance. Recommendations and implications are considered.
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