What is attention deficit disorder?

Attention Deficit Disorder (ADD) or Attention Deficit /Hyperactive Disorder (ADHD) are terms used to describe a condition affecting both children and adults. ADD is a neurobehavioral developmental disorder in which an individual has difficulty concentrating on tasks, is easily distracted, or is hyperactive. The child with ADD: * has difficulty finishing any activity that requires concentration at home, school or play; shifts from one activity to another. * doesn't seem to listen to anything said to him or her. * acts before thinking, is excessively active and runs or climbs nearly all the time; often is very restless even during sleep. * requires close and constant supervision, frequently calls out in class, and has serious difficulty waiting his of her turn in games or groups. (see related link)
I assume that we are talking about ADD (Attention Deficit Disorder).The main features of attention deficit disorder are inattention, hyperactivity, and impulsivity.

The causes remain unknown, but ADD can be diagnosed and effectively treated.