Bases for recent allegations of sex bias in Kohlberg's theory of moral development are discussed, and studies comparing the development of moral reasoning across the sexes are reviewed. A meta-analysis supported the conclusion that the overall pattern is one of nonsignificant sex differences in moral reasoning. (Author/RH)

Results suggest that (1) sex differences are found for some types of spatial ability but not others; (2) large sex differences are found only on measures of mental rotation; (3) smaller sex differences are found on measures of spatial perception; and (4) when sex differences are found, they can be detected across the life span. (Author/RH)

Examines 2,000 Strange Situation classifications obtained in eight different countries. Differences and similarities between distributions in classifications of samples are investigated using correspondence analysis. Substantial intracultural differences are established; data also suggest a pattern of cross-cultural differences. (Author/RWB)

Differences between father-absent and father-present samples were not large. Although study quality was not the best predictor of outcome, the best-quality studies produced nonsignificant estimates of effect size. Most effect-size estimates were less than .5; many were much smaller. (RH)

Examines the findings of 53 studies of sex differences in propositional logic, combinatorial reasoning, and proportional reasoning tasks. Finds sex differences for the latter two tasks to be vulnerable to Rosenthal's "file drawer" problem and effect size to be small for all tasks. Discusses possible explanations for sex differences in…