For outgroups, a perceiver will experience an intergroup context and therefore attend to differences between the two groups. Consequently, less attention is paid to differences between outgroup members and this leads to perceptions of outgroup homogeneity.

What is the illusion of outgroup homogeneity?

An outgroup homogeneity (OH) effect implies that outgroup members are perceived to be more similar than ingroup members.

How can we reduce outgroup homogeneity effect?

Successful intergroup contact tends to reduce the perception of outgroup homogeneity. Contact also helps us feel more positively about the members of the other group, and this positive affect makes us like them more.