Out-group homogeneity
（重定向自Outgroup homogeneity bias）
The out-group homogeneity effect is one's perception of out-group members as more similar to one another than are in-group members, e.g. "they are alike; we are diverse". The term "outgroup homogeneity effect", "outgroup homogeneity bias" or "relative outgroup homogeneity" has been explicitly contrasted with "outgroup homogeneity" in general, the latter referring to perceived outgroup variability unrelated to perceptions of the ingroup.