quality:correction, information:filtering
Common environment

One explanation for why stereotypes are shared is that they are the result of a common environment that stimulates people to react in the same way.

The problem with the 'common environment' is that explanation in general is that it does not explain how shared stereotypes can occur without direct stimuli. Research since the 1930s suggested that people are highly similar with each other in how they describe different racial and national groups, although those people have no personal experience with the groups they are describing.