Peer and Sibling Aggression: An Investigation of Intra- and Extra-Familial Bullying.

Study examined the prevalence of bullying in 375 American children, determined the relationship between peer bullying and sibling bullying, and examined the link between psychological difficulties and bullying. In general those who were both bullies and victims reported the highest level of psychological difficulty followed by victims, bullies, and those not involved in bullying. (Author/MKA)