 They also found a strong association between short-term memory impairments for all categories tested (verbal, visual, and global) and the duration of the abuse.Incest between a child or adolescent and a related adult is known as child incestuous abuse, and has been identified as the most widespread form of child sexual abuse with a highly significant capacity to damage the young person.One researcher stated that more than 70% of abusers are immediate family members or someone very close to the family.