“…Essentially this study represents a convergence of two lines of research. One involves the development of analytical objective measures of pilot performance (Boyle & Hagin, 1953;Ericksen, 1952b;Ornstein, Flexman, & Nichols, 1954;Smith, Flexman, & Houston, 1952;Sutter, Townsend, & Ornstein, 1954). The other line of research is represented by laboratory studies of experimental tasks concerned with the isolation of generalizable dimensions of skilled performance (Fleishman, 1953(Fleishman, , 1954(Fleishman, , 1956(Fleishman, , 1958a(Fleishman, , 1958bFleishman & Hempel, 1954a, 1954b, 1956Parker & Fleishman, 1959).…”