Patricia Howlin is Principal Clinical Psychologist at the Maudsley Hospital, London, working mainly with autistic children and those suffering from pervasive developmental disorders. She is also Senior Lecturer in the Department of Child and Adolescent Psychiatry and Psychology at the Institute of Psychiatry, London. She has been involved in research and treatment with autistic children for many years. Her research interests include a follow-up study of autistic individuals, and a comparison of young autistic adults and a matched group of individuals with severe early language delays.