Significant progress has been made in assessing children with autism spectrum disorders, but the field has lacked a single, comprehensive resource that assembles current best practices within a unified assessment framework. This authoritative book demonstrates how to craft a complete, scientifically grounded, and clinically useful portrait of a child's strengths and difficulties in social behavior, language and communication, intellectual functioning, motor skills, and other key areas of impairment and comorbidity. Leading experts illustrate ways in which school and clinical practitioners can integrate data from a variety of sources to improve the accuracy of diagnosis and inform the development of individualized interventions.