title: Two quantitative measures of skill development.
mesh_terms: D001077:Aptitude Tests; D002648:Child; D002657:Child Development; D005246:Feedback; D006309:Hearing; D006801:Humans; D008297:Male; D008962:Models, Theoretical; D009048:Motor Skills; D011930:Reaction Time; D013997:Time Factors; D014796:Visual Perception