With more than 30 years in clinical practice, Dr. Brown specializes in treating children and adults with ADD/ADHD who have high IQs. Dr. Brown believes that the difficulties in attention in ADD/ADHD are caused by an impaired executive function. In addition to his work as a clinical psychologist, Dr. Brown is a university professor who has presented information about Attention Deficit Disorder to groups in many different venues. He has written books about ADD which include, Attention Deficit Disorder: The Unfocused Mind in Children and Adults, A New Understanding of ADHD in Children and Adults: Executive Function Impairments, Smart but Stuck: Emotions in Teens and Adults with ADHD, and Outside the Box: Rethinking ADD/ADHD in Children and Adults—A Practical Guide.