This study evaluated the accuracy of hypothesized relationships of the five-factor model of personality to four targeted personality disorders in a large multisite sample of patients. Data were gathered from 668 patients, who were assigned to one of five study cells: Borderline, Schizotypal, Avoidant, and Obsessive-Compulsive Personality Disorder, and a Major Depression without personality disorder comparison group. Patients were administered a questionnaire designed to assess the domains and facets of the five-factor model and results were compared among diagnostic groups and between patients and community norms. Although many relationships between personality traits and disorders were obtained, the magnitude of the relationships varied greatly as a function of the comparison group involved. In general, the differences between the personality disorder patients and community norms were far larger than the differences between the specific personality disorder groups. Also, for avoidant personality, it appeared that statistical interactions between personality factors are needed to better differentiate it from other personality disorder groups. The four personality disorder groups studied could each be distinguished from community norms on the personality dimensions of the five-factor model. However, differentiating among the four groups proved more difficult, as each shared the configuration of high Neuroticism, low Agreeableness, and low Conscientiousness. It does not appear that these disorders represent extremes of different personality dimensions, but rather each appears to be a variant of the same extreme configuration. Differences between personality disorders may reflect diverse interactions among the dimensions, rather than differences on single dimensions.
The five-factor model of personality, which has been widely studied in personality psychology, has been hypothesized to have specific relevance for DSM-defined personality disorders. To evaluate hypothesized relationships of the five-factor model of personality to personality disorders, 144 patients with personality disorders (diagnosed via a structured interview) completed an inventory to assess the five-factor model. Results indicated that the majority of the personality disorders can be differentiated in theoretically predictable ways using the five-factor model of personality. However, while the personality disorders as a whole appear to be differentiable from normal personality functioning on the five factors, the patterns are quite similar across the disorders, a finding that may provide some insight into the general nature of personality pathology but may also suggest problems with discriminant validity. Third, it does not appear that considering disorders as special combinations of features (as might be expected in some categorical models) is more informative than considering them as the sum of certain features (as might be expected in a dimensional model).
The intersection between the legal and mental health professions is sometimes marked by controversy, and the application of psychological assessments to forensic issues is no exception. However, the field of psychological assessment holds particular promise for clarifying decision making within the forensic arena, as it can bring a particularly well-established body of theory and data to bear upon clinical forensic practice. This article describes one psychometric instrument, the Personality Assessment Inventory, as an example of how particular assessment instruments can help inform this process.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.