Believed to be a mild form of autism in which social relationships are poor, and stereotyped behaviour is intense and rigid, but language and intelligence are intact.
A disorder of development characterized by gross and sustained impairment in social interaction and restricted, repetitive, and stereotyped patterns of behaviour, interests, and activities occurring in the context of preserved cognitive and language development.
Included with Autistic Disorder in the category of Pervasive Developmental Disorders, usually evident in the first years of life. Children with these disorders have difficulty in accomplishing early developmental tasks entailing language, communication, socialization, and motor behavior. These disorders are rare and appear to have genetic cause.