ADD/ADHD | What Is Attention Deficit Hyperactivity Disorder?ADHD, Parent's Section, Video / By Helplink Admin Here’s everything you need to know about Attention Deficit Hyperactivity Disorder (ADHD) in children. Thomas E. Brown, PhD, discusses ADHD diagnosis, ADHD symptoms, available ADHD treatment options, and ADHD medication. As our expert says, ADD/ADHD is not a behavior problem. It has far more to do with the brain’s management system. Remember, ADHD has nothing to do with how smart a person is.