The DVD, Autism Spectrum Disorders in Young Children: Volume 1: An Overview/ Learning to Observe Across the Three Symptom Domains, contains extensive video examples of core autism symptoms in young children with ASD, ages 12 months to 4 years, accompanied by narration and explanation, and side-by-side video comparison to young children without ASD. It presents a conceptual framework to teach observation skills that can be immediately applied to clinical and home settings and is based on developmental and clinical research.