Thomas W Phelan

Thomas W. Phelan, PhD, is a clinical psychologist and author known for books on parenting, child behavior, and attention-deficit/hyperactivity disorder, including the widely used "1-2-3 Magic" series. He has worked with children, adults, and families for more than 35 years and has been associated with professional organizations such as CHADD and ADDA.[1][2][3]