Maletzky (1993) found that, of his sample of 4,402 convicted child sex offenders, 0.4% were female.According to research conducted in Australia by Kelly Richards on child sexual abuse, 35.1% of female victims were abused by another male relative and 16.4% of male victims were abused by another male relatives. Male relatives were found to be the most relevant predators in the case of both gender.In U.S. schools, educators who offend range in age from "21 to 75 years old, with an average age of 28".According to C.E. Dettmeijer-Vermeulen, Dutch national spokeswoman on human traffic and sexual violence against children, in the Netherlands, 3% of the convicted perpetrators are women, 14.58% of the victims are boys and "most victims were abused by a family member, friend or acquaintance." One in six perpetrators are underage. Typology
Early research in the 1970s and 1980s began to classify offenders based on their motivations and traits. Groth and Birnbaum (1978) categorized child sexual offenders into two groups, "fixated" and "regressed". Fixated were described as having a primary attraction to children, whereas regressed had largely maintained relationships with other adults, and were even married. This study also showed that adult sexual orientation was not related to the sex of the victim targeted, e.g. men who molested boys often had adult relationships with women.Later work (Holmes and Holmes, 2002) expanded on the types of offenders and their psychological profiles. They are divided as follows:
Situational – does not prefer children, but offend under certain conditions.
Child sexual abuse victims report almost four times as many incidences of self-inflicted harm. Sexual assault among teenagers has been shown to lead to an increase in mental health problems, social exclusion and worse school performance. A well-documented, long-term negative effect is repeated or additional victimization in adolescence and adulthood. A causal relationship has been found between childhood sexual abuse and various adult psychopathologies, including crime and suicide, in addition to alcoholism and drug abuse. Males who were sexually abused as children more frequently appear in the criminal justice system than in a clinical mental health setting. A study comparing middle-aged women who were abused as children with non-abused counterparts found significantly higher health care costs for the former. Intergenerational effects have been noted, with the children of victims of child sexual abuse exhibiting more conduct problems, peer problems, and emotional problems than their peers.A specific characteristic pattern of symptoms has not been identified, and there are several hypotheses about the causality of these associations.Studies have found that 51% to 79% of sexually abused children exhibit psychological symptoms. The risk of harm is greater if the abuser is a relative, if the abuse involves intercourse or attempted intercourse, or if threats or force are used. The level of harm may also be affected by various factors such as penetration, duration and frequency of abuse, and use of force. The social stigma of child sexual abuse may compound the psychological harm to children, and adverse outcomes are less likely for abused children who have supportive family environments.