In this program Dr. Barkley provides detailed information on the specific nature of ADHD symptoms and the current DSM5 diagnostic criteria for ADHD. He then reviews the various modifications necessary for updating the DSM criteria and making them more useful and rigorous with special populations (girls, adults, etc.). Dr. Barkley then addresses the issue of subtyping of ADHD along with the emerging conclusion that one form of the inattentive type may constitute a new disorder known in research as sluggish cognitive tempo or sometimes called ADD by clinicians.