Beyond sex differences in visuo-spatial processing: the impact of gender trait possession.

Much research has emphasized the presence of sex differences in visuo-spatial processes while neglecting individual differences in performance within the two sexes (Archer, 1987). The present study looks beyond sex differences and considers the association of self-perceived gender trait possession with performance in two visuo-spatial tasks. The findings indicate that, in a 3-D mental rotation task, where a substantial sex difference occurred, gender trait possession adds significantly to the overall explanation of performance, the important gender trait variable being a measure of androgyny. With the Group Embedded Figures Task, gender trait measures were the only significant variables in differentiating performance, in this case masculinity was the important gender trait variable. The implication of such results for conventional explanations of individual differences in visuo-spatial processing is discussed.