Stephen Faraone is an American psychologist. He has worked mainly on attention-deficit hyperactivity disorder and related disorders and is considered one of the most influential psychologists in the world. Stephen runs the website "The ADHD Evidence Project" which seeks to improve the lives of people with ADHD. Attention Deficit Hyperactivity Disorder (ADHD) is a well-studied, thoroughly legitimate mental disorder that causes sometimes devastating suffering for more than 17 million Americans. Yet, in the first quarter of the 21st century misunderstandings about ADHD abound, especially as new data about the causes and course of the disorder have reshaped our view of the disorder.