“…But precise examination of the items included in their listings in fact reveals power ful support for the thesis that boys have greater nAch and girls nApp. Many of the studies Maccoby and Jacklin (1974) list as contradicting the thesis do not in fact measure nAch (Kimball, 1973;Masters and Christy, 1973;Horner, 1972;Ryan and Strawbridge, 1969;Callard, 1968;Wyer, 1968;Field, 1951;Veroff, 1950) or nApp (Zimmerman and Bell, 1972;Crowder and Hohle, 1970;Todd and Nakamura, 1970;Montanelli and Hill, 1969;Unikel et al, 1969); and some, being adults' ratings of children's needs rather than direct measurements {Coates, 1973;Radin, 1973;Emmerich, 1971;Lansky and McKay, 1969;Hatfield et al. 1967), are subject to uncontrolled and undefined factors.…”