Cluster analytically derived MMPI profile subgroups of incarcerated adult rapists.

Sex offenders are known to be heterogeneous in their patterns of personality functioning and behavior. The present study conducted a multivariate cluster analysis on the MMPIs of 120 incarcerated adult male rapists. The analysis resulted in the identification of five MMPI profile subgroups. Additional differences among subgroups were identified in the circumstances of the crime and responses to the Multiphasic Sex Inventory. Levels of psychopathology, as indicated by the MMPI, ranged from slight to extreme. Results are discussed with reference to previous MMPI research with sex offenders. Suggestions for future research are offered.