Violent Delinquency: An Examination of Psychopathic Typologies
This study sought to determine the combined effects of psychopathy, low intellectual functioning, and love deprivation on violent delinquency. Low-intellectual-functioning psychopaths were significantly more violent than were low- 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.
Walsh, Anthony; Beyer, Arthur J.; and Petee, Thomas A.. (1987). "Violent Delinquency: An Examination of Psychopathic Typologies". The Journal of Genetic Psychology, 148(3), 385-396.