Harvey C. Parker, PhD, is a clinical psychologist. A cofounder and former executive director of Children and Adults with Attention Deficit/Hyperactivity Disorder (CHADD), he has been highly involved in the advocacy for better understanding and treatment for children, adolescents, and adults with ADHD. He is the author of The ADHD Hyperactivity Handbook for Schools and The Problem Solver Guide for Students with ADHD, and the coauthor of Study Strategies for Early School Success. He lives in Weston, Florida.