Dr. Russell Barkley, a professor of psychiatry at the University of South Carolina, is a leading expert on ADHD. Here he discusses the five cognitive abilities that appear to be impaired in children with ADHD. For more from the Child Mind Institute visit http://www.childmind.org/. For more on ADHD, visit http://goo.gl/Hn3rj Visit our mental health guide: http://goo.gl/ASI4K Worried about your child? Connect symptoms and behaviors to possible childhood psychiatric and learning disorders: http://goo.gl/l5mWX