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.…

This study established content validity and reliability for the Infant Behavioral Summarized Evaluation, a rating scale for young children with autism. Analysis of videotapes for 89 children (ages 6-48 months) revealed a significant group of 19 items, including characteristic early autistic behaviors and some less commonly described (such as…