Replicated a study to determine if a sex difference in spatial visualization ability exists among grade six students verging on adolescence and if instruction differentially affects boys/girls at this age. Although instruction significantly affected boys/girls in grades seven to eight, current results do not support the same interaction among…

Compared formal reasoning responses of seventh-and eighth-grade students on three tests of formal reasoning. The three tests differ only in the mode of equipment presentation on identical test items and problems. Tests included three-dimension demonstration (Lawson), two-dimension showing drawings of materials used in three-dimensional test, and…