Attention Deficit Hyperactivity Disorder is a neurologically based disorder.

This position has become controversial as many would like to dismiss the diagnosis of Attention Deficit Hyperactivity Disorder altogether saying that there is no evidence of neurological differences, or that there are no medical tests to diagnose ADD ADHD, or that the diagnostic criteria is too broad. But the fact of the matter is that there are measurable neurological differences, and there are several good tests available to physicians and psychologists, available to diagnose the disorder.

For now we will simply report that there is a tremendous amount of research to support the statement that, indeed, Attention Deficit Hyperactivity Disorder is a neurologically based condition. Much of this information is available at the ADHD Information Library