Developmental Analysis of Sex Differences in Categorical Organization
Sex differences in recall and categorical organization of 180 children in Grades 2, 4, and 6 were investigated for a single-trial free-recall task. A memory task composed of 20 items from five conceptual categories was individually administered to each subject under standard instruction. Analysis suggested differential developmental trends for boys and girls. Significant sex differences in recall were obtained in Grade 6 only, with 36 boys showing better recall than 36 girls. An initial male developmental lag in clustering was evident in Grade 2, but no significant sex differences in Grade 4. By Grade 6 boys showed superior clustering. It is concluded that girls and boys show different developmental trends in categorical organization. The developmental trends in the pattern of sex differences in categorical organization obtained in this study are discussed in relation to patterns reported in previous studies.