1. Diagnosis and definition of autism and other pervasive developmental disorders / Fred R. Volkmar and Catherine Lord -- 2. Epidemiological surveys of autism / Eric Fombonne -- 3. Psychological factors in autism / Margot Prior and Sally Ozonoff -- 4. Genetic epidemiology of autism and other pervasive developmental disorders / Peter Szatmari and Marshall B. Jones -- 5. Neurobiology of autism / Fritz Poustka -- 6. Psychopharmacology / Christoper J. McDougle -- 7. Behavioural and educational approaches to the pervasive developmental disorders / Sandra L. Harris -- 8. Outcome in adult life for people with autism and Asperger's syndrome / Patricia Howlin and Susan Goode -- 9. Autism and the evolution of human social skills / Lynn Waterhouse and Deborah Fein