“…Beginning in Grade 8 or 9, sex-related differences occur fairly consistently, and when they occur they almost always favor boys (Armstrong, 1981; Backman, 1972; Benbow & Stanley, 1982a; Burnett, Lane, & Dratt, 1979; Connor & Serbin, 1985; deWolf, 1981; Fennema, 1980; Fennema & Carpenter, 1981; Fennema & Sherman, 1977; Fox, Brody, & Tobin, 1985; Hanna, 1986; Hilton & Bergland, 1974; Kissane, 1986; Moore & Smith, 1987; Mura et al, 1985; Pallas & Alexander, 1983; Pattison & Grieve, 1984; Perl, 1982; Sawada, Olson, & Sigurdson, 1981; Weiner & Robinson, 1986; Wise, 1985). Male superiority does not appear in all samples, however.…”