“…This work is an outgrowth of earlier research on the structure of human perceptual-motor abilities (Fleishman, 1953(Fleishman, , 1956a(Fleishman, , 1956b(Fleishman, , 1958a(Fleishman, , 1958bFleishman & Hempel, 1954a, 1954bFleishman & Hempel, 1956;Fleishman & Ornstein, 1960;Parker & Fleishman, 1960).…”