*Conduct disorder is characterized by persistent antisocial behavior in children and adolescents that significantly impairs their ability to function in social, academic, or occupational areas. Behavioral symptoms include physical fights, destruction of property, vandalism, and serious violation of rules among others. Oppositional defiant disorder consists of an enduring pattern of uncooperative, defiant, and hostile behavior toward authority figures without major antisocial violations. Asperger's disorder is a pervasive developmental disorder characterized by the same impairments of social interaction and restricted stereotyped behaviors seen in autistic disorder, but there are no language or cognitive delays. Attention deficit hyperactivity disorder is characterized by inattentiveness, overactivity, and impulsiveness.