Dynamic stereotypes characterize social groups that are thought to have cha
nged from the attributes they manifested in the past and even to continue t
o change in the future. According to social rob theory's assumption that th
e role behavior of group members shapes their stereotype groups should have
dynamic stereotypes to the extent that their typical social roles are perc
eived to change over time. Applied to men and women, this theory makes two
predictions about perceived change; (a) perceivers should think that sex di
fferences are eroding because of increasing similarity of the roles of men
and women and (b) the female stereotype should be particularly dynamic beca
use of greater change in the roles of women than of men. This theory was te
sted and confirmed in five experiments that examined perceptions of the rol
es and the personality, cognitive and physical attributes of men and women
of the past, present, and future.