John N. Constantino, M.D., is Blanche F. Ittleson Professor of Psychiatry and Pediatrics Director of the Division of Child and Adolescent Psychiatry, Washington University School of Medicine, St. Louis, Missouri. 

After receiving his undergraduate degree (B.A. 1984, distinction in all subjects) from Cornell University and his medical degree (M.D.) from the Washington University School of Medicine in St. Louis, Dr. Constantino completed a combined residency in Pediatrics, General Psychiatry, and Child Psychiatry at the Albert Einstein College of Medicine, Bronx, New York. Dr. Constantino has pioneered the development of quantitative methods for measuring and understanding the development of reciprocal social behavior in children. He and his colleagues around the world have applied these methods to studies of the genetic and neurobiologic causes of autism, the development of other disorders of social behavior in children, and the effects of intervention. 

Dr. Constantino's work has involved the genetic epidemiology of autistic social impairment, quantitative methods for measuring inherited phenotypic components of autistic syndromes, and the discovery of distinct patterns of familial aggregation of sub clinical autistic traits in the relatives of children with autism. He has authored or co-authored over 60 original peer-reviewed papers in the scientific literature, directs a federally-funded research program, is a member of the scientific steering committee of a national gene bank for autism (the Autism Genetic Resource Exchange, AGRE), is a past-chair of the Mental Health Commission of the State of Missouri, and practices child and adolescent psychiatry at Washington University.