Concept learning in hyperactive and normal children.
Vaira Freibergs, Virginia I. Douglas · Journal of Abnormal Psychology · 1969
Hyperactivity is a common presenting symptom among children seen in psychiatric clinics, and refers to an excessive level of activity which is sufficiently sustained to become a serious source of complaint. Until recently interest in the hyperactive child was confined to the psychiatric literature. As a result, most of the information currently available deals with questions of diagnosis and treatment. [...]