Features useful in distinguishing 20 children with clinically diagnosed pervasive developmental disorder (PDD) from 40 children with autism or language disorder were developed from a retrospective chart review using 80 items. The most useful items were then evaluated using a second set of cases (total n=120). Fewer items discriminated PDD from…

Analyses of home movies taken by 12 parents before recognition of their children's autistic disorders confirmed that anomalies could be noted as early as the first few months of life, such as anomalies of eye contact, deficient variability of emotional expression, deficit of attention, and initiation of communication, and motor abnormalities.…