Attention Deficit Hyperactivity Disorder (ADHD) is a prevalent disorder of childhood affecting approximately 5% of school-aged children. It is characterised by developmentally inappropriate levels of inattention, hyperactivity and impulsivity. Despite its diagnostic validity, the disorder remains controversial with a great deal of misunderstanding among professionals and the public about the condition. The Handbook of Attention Deficit Hyperactivity Disorder is a major clinical and research handbook presenting the latest research from those working at the cutting-edge of ADHD. It covers a range of topics including neurobiology, psychopharmacology, educational and psychological aspects of ADHD and is a one-of-a-kind reference for anyone working or researching in this area.