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A registered clinical psychologist, Thomas W. Phelan, Ph.D. has worked with children, adults and families for over 35 years. He is a member of the American Psychological Association and the Illinois Psychological Association.

In addition to writing and producing, Dr. Phelan maintains an active schedule of international lectures, and is a frequent guest on radio and television. His articles appear in numerous regional and national publications. Dr. Phelan received his Doctorate from Loyola University Chicago in 1970 after completing his internship at the Loyola Child Guidance Center. He worked at the DuPage County Mental Health Center until 1972 and then entered private practice.

He has also served on the boards of directors for both ADDA and CHADD, two national organizations for the parents of children with ADD/ADHD. He was inducted into the CHADD Hall of Fame in 1997.