The evaluation of attention deficit hyperactivity disorder begins with a medical history and physical exam. The physical exam is usually normal. If symptoms and signs are present, psychological testing helps to confirm the diagnosis.

There is controversy surrounding attention deficit hyperactivity disorder. Experts are concerned that some children receive treatment, even though they do not have the disorder. These children are inappropriately subjected to side effects from the medications used to treat attention deficit hyperactivity disorder. However, it is important to make the diagnosis, so that children who have attention deficit hyperactivity disorder do not suffer learning disabilities and social problems.