Dr David Finkelhor has studied abuse problems among children and family violence in general since 1977. In his empirical and conceptual work, he points out the psychological impact of abuse, especially among children. He believes that child sexual abuse especially by a relative, usually results to such long-term effects as psychopathology. The victims of abuse usually become abusers themselves to aggravate the cycle of abuse within a family.
The fact that one was abused while young increases the chances of him or her becoming an abuser in later life. This is even more profound among the abuse victims who develop such post-traumatic disorders as substance abuse (especially alcoholism), poor self-esteem, destructive behavior, criminality in adulthood, general psychological distress and somatization.