The research included both institutionalized perpetrators and those in community-based treatment settings. The analysis focused on 15 variables, including the ability to communicate verbally, assertiveness in social situations, social isolation, empathy with victims, abuse history, relationships with spouses and others, and the history of involvement with the victim. Findings confirmed other research indicating that incest perpetrators, especially those in institutions, lacked essential social skills. They often thought that incestuous behavior was inappropriate and unnatural before they became involved in incest. In addition, most thought that something could have been done to prevent the incest, but most were unable to assert themselves and discuss the incest with anyone. Moreover, they had few close friends, and their marital relationships were poor. Finally, the availability and vulnerability of the victim was the main reason for the victim's selection. Tables and 19 references.