The sample consisted of all male juvenile delinquents (256) referred for psychological testing in Toledo, Ohio, and Boise, Idaho, during 1980-1984. All data were taken from files that had been closed because the subjects had reached adulthood, thus ensuring a complete delinquent history and a constancy of age for all subjects. The measure of psychopathy was the Wechsler P-V test, and intellectual functioning was determined by the WISC/WAIS verbal IQ distribution. The measure of love deprivation was the Walsh/Petee Love Deprivation Index, which identifies such experiences as physical abuse, psychological abuse, and neglect. Violent delinquency was measured by the Andrew Violence Scale. Low-intellectual-functioning psychopaths were significantly more violent than were low-intellectual-functioning or high-intellectual-functioning nonpsychopaths or high-intellectual-functioning psychopaths. Love deprivation was more strongly related to violence than was psychopathy/intellectual functioning; and severely love-deprived, low-intellectual-functioning psychopaths were the most violent. 3 tables and 25 references. (Author abstract modified)