“…Some of the more important studies of broad scope since 1962 include Durham and Yerkes (1964), Yerkes and others (1965), Yerkes and Campbell (1971), Gardett (1971), Hill (1971), Yerkes (1972), Harding (1973), Yeats (1973), Crowell (1974), Campbell and Yerkes (1976), Nardin and Henyey (1978), and Schoellhamer and others (1981). Recent summary papers are by Schwartz and Colburn (1987) and Wright (1987b).…”