A great deal of research has focused on delineating the nature and ext
ent of sex differences in cognitive abilities and performance. However
, recent research and theory suggest that cognition maybe much more so
cially situated than psychology has recognized. Distinguishing ''sex''
from ''gender'' places sex difference research in a context that conc
eives of culturally-produced gender as the operation of a complex syst
em of social classification and hierarchy. The gender system is concep
tualized as operating at three levels: Sociocultural, interactional, a
nd individual. By using this framework, we move the focus of study fro
m individual or group differences in cognition to documenting how diff
erent levels of the gender system interact to create, maintain, and in
terpret sex differences.