“…Later studies using MacCrone's scale (Crijns, 1959;Mac-Crone, 1937, 1949, or adaptations of it (Edelstein, 1972(Edelstein, , 1974Groenewald, 1975;Groenewald & Heaven, 1977;Lever, 1968bLever, , 1972Pettigrew, 1960;Spangenberg & Nel, 1983;van den Berghe, 1962;Viljoen, 1972), or scales of a similar nature (Colman, 1971;Thiele, 1988), showed the same general pattern of results, and recorded little change over a period of some 60 years. Some researchers identified subtle, but frequently unstable, trends within this general pattern: for example, Edelstein (1974) found evidence of gender differences among black subjects, but Foster (1991) did not find consistent evidence of this in his review of the literature.…”