Dr. Thomas R. DuHamel, PhD is a clinical child psychologist who has successfully collaborated with parents and pediatric health care providers about functional constipation for over 30 years. Dr. DuHamel is currently in private practice with the Associates in Behavior and Child Development, ABCD Inc, in Seattle, Washington. He is a Clinical Associate Professor in the Department of Psychiatry and Behavioral Sciences at the University of Washington School of Medicine. Dr. DuHamel graduated from Brown University and earned his doctorate in clinical psychology at the University of Massachusetts at Amherst. He completed a post doctoral residency in the Department of Medical Psychology at the University of Oregon Medical School in Portland and was formerly Chief Psychologist at Seattle Children’s Hospital. Dr. DuHamel is married with two children and a very precious granddaughter.