A cross-cultural quantitative review of contemporary findings of gende
r differences in variability in verbal, mathematical, and spatial abil
ities was conducted to assess the generalizability of U.S. findings th
at (a) males are more variable than females in mathematical and spatia
l abilities, and (b) the sexes are equally variable in verbal ability.
No consistent gender differences (variance ratios) were found across
countries in any of the three broad ability domains. Instead, males we
re more variable than females in some nations and females were more va
riable than males in other nations. Thus, the well-established U.S. fi
ndings of consistently greater male variability in mathematical and sp
atial abilities were not invariant across cultures and nations.