Commenting on an historically significant article by A. T. Childers ("Hyper-Activity in Children Having Behavior Disorders," "American Journal of Orthopsychiatry," 5:227-243 1935), Barkley states that it is evident that the Childers' article deserves a place of importance in the history of ADHD, as much of what Childers found to be associated with hyperactivity in children has since been substantiated in thousands of scientific studies. Although some of Childers' observations proved incorrect, this is understandable given the larger professional context in which he practiced at the time, and the exceptionally limited scientific methods available for evaluating his samples with regard to their psychological, psychiatric, neurological, and genetic features. Overall, it can be said that the work done by Childers resulted in a legacy of substantial information about hyperactivity in children, much of which is still applicable today.