A pervasive developmental disorder characterized by an inability to understand how to interact socially. Other typicalfeatures of the syndrome include clumsy and uncoordinated motor movements, social impairment with extremeegocentricity, limited interests and/or unusual preoccupations, repetitive routines or rituals, speech and languagepeculiarities, and non-verbal communication problems. Children with Asperger syndrome generally have few facialexpressions apart from anger or misery. Most have excellent rote memory and musical ability, and become intenselyinterested in one or two subjects (sometimes to the exclusion of other topics). They may talk at length about a favoritesubject or repeat a word or phrase many times. Children with Asperger syndrome tend to be "in their own world" andpreoccupied with their own agenda.