Classes of adult offenders: a multivariate approach.

The present study attempted to develop a classification system based on the personality characteristics of reformatory inmates. Although such systems have been of demonstrated utility in other areas of psychopathology, the classification of adult offenders has been generally ignored. Classes were identified through a two-stage clustering analysis of the personality profiles of 187 reformatory inmates and SO university students. Twelve of these classes replicated with a second, similar sample. Further examination with discriminant analyses and replication with a second assessment instrument supported the distinctness and stability of the classes. Finally, the results from the personality inventory and a specially constructed questionnaire were used to describe each of the classes.