Discriminating personality disorders using the WAIS-R: a comparison of three approaches

The purpose of this article is to determine if performance on the Wechsler Adult Intelligence Scale-Revised (WAIS-R) can be used to discriminate between the different taxonomies of personality disorder classification specified by three models: the biosocial, the interpersonal, and that described by the Diagnostic and Statistical Manual of Mental Disorders (3rd ed., rev. [DSM-III-R]; American Psychiatric Association, 1987). Three discriminant function analyses were performed and the results indicated the usefulness of the WAIS-R in making such differentiations for all the approaches. The WAIS-R proved most effective with the biosocial model, evidencing a robust and clinically meaningful pattern of results. Implications for further research are discussed.