Gilberstadt and Duker@) presented 19 sets of rules by which Minnesota Multiphasic Personality Inventory (MMPI) profiles of psychiatric patients could be classified into types. For each of the profile types, pertinent clinical data concerning symptoms and complaints, personality traits, psychiatric diagnosis, and history and background features also were provided.
Gilberstadt and Duker do not provide data on the proportion of their total patient population that was classified by these 19 types, presumably because they also indicatec2-P. I*) that frequency of occurrence was not necessarily a criterion for selection of a type. Nevertheless, it would seem that the utility of actuarial approaches to interpretatioq of MMPI profiles would depend, in part, on the capacity of the system to include a substantial proportion of the profiles within a population.
The purpose of the present study was to apply the Gilberstadt-Duker rules to the MMPI profiles of admissions to a Veterans Administration neuropsychiatric hospital in order to obtain data on the proportion of profiles classified. It might be noted that the Gilberstadt-Duker rules were originally derived on admissions to a Veterans Administration inpatient setting.