Cooperation is a fundamental human ability that seems to be inversely related to aggressive behaviour in typical development. However, there is no knowledge whether similar association holds for children with autism spectrum disorder. A total of 27 boys with autism spectrum disorder and their gender, age and total score intelligence matched…

Studied patterns of boys' social development by examining data from two longitudinal studies: a Finnish study of eight year olds begun in 1968; and a French Canadian study of six year olds begun in 1984. Patterns were identified using variables of aggression, hyperactivity, inattentiveness, anxiety, and lack of prosocial behavior. (LB)