Autism and Pervasive Developmental Disorders Sourcebook: Basic Consumer Health Information About Autism Spectrum Disorder, and Pervasive Developmental Disorders Such as Asperger Syndrome and Rett Syndrome, Along With Facts About Causes, Symptoms, Assessment, Interventions, Treatments, and Education. Tips for Family Members and Teachers on the Transition to Adulthood, a Glossary of Related Terms, and a Directory of Resources for More Information