Attention-deficit/hyperactivity disorder is a neurobehavioral disorder characterized by a combination of inattentiveness, distractibility, hyperactivity, and impulsivity.
Five to seven percent of children are diagnosed with this developmental disorder. Some simply cannot concentrate; others become disruptive, defiant and have trouble getting along with parents, peers, or teachers.
Information above from Psychology Today (Click here to read more)
(Click here for information from the National Institute of Health)