Weithorn Corinne J, Kagen Edward
Graduate Programs in Educational Services.
Jewish Welfare Board.
Am J Orthopsychiatry. 1978 Jan;48(1):148-159. doi: 10.1111/j.1939-0025.1978.tb01296.x.
Developmental theory suggests that language may be a compensatory factor in the cognitive functioning of hyperactive children. A comparison between first-graders of high activity level and those of low activity level provided support for this theory. Language maturity emerged as a significant variable in task performance and overall school achievement for the high-activity-level group only.