This is a concise, state-of-the-art synthesis of the vast amount of information related to attention deficits and hyperactivity in children. The author explores key issues such as: whether there is in fact a valid syndrome; which factors predict subsequent adolescent and adult functioning; and the most suitable assessment instruments. The volume encompasses a wide range of perspectives, including clinical, developmental, psychodiagnostic, psychobiological, environmental/familial and social cognitive.