Hyperactive
Attention deficit hyperactivity disorder, or ADHD, is one of the most common developmental disorders, with an average of 9 per cent of U.S. children between the ages of five and seventeen diagnosed each year. It is also one of the most controversial. Since the 1950s, when hyperactivity in children was first diagnosed, psychiatrists, educators, parents and politicians have debated the causes, treatment and implications of the disorder.