Attention Deficit Disorder with Hyperactivity 39 Humans 39 human 39 attention deficit disorder 36 female 33 male 33 Male 31 Female 29 Child 23 child 23 ADHD 20 psychology 20 Article 19 adolescent 19 adult 18 Adolescent 17 Adult 14 major clinical study 14 controlled study 12 physiology 9 Attention 8 attention 8 cognition 8 Child, Preschool 7 child parent relation 7 pathophysiology 7 preschool child 7 procedures 7 school child 7 Cognition 6