Outgroup homogeneity bias
- Outgroup homogeneity bias
According to the outgroup homogeneity bias, individuals see members of their own group as being relatively more varied than members of other groups.
This bias was found to be unrelated to the number of group and non-group members individuals knew. One might think that people thought members of their own groups were more varied and different simply because they knew them better, but this is actually not the case. The outgroup homogeneity bias was found between groups such as "men" and "women" who obviously interact frequently.
The implications of this effect to stereotyping is obvious, and it may be related to confirmation bias.
A similar bias on the individual level is the trait ascription bias. Compare to the group attribution error and the dilution effect.
In fiction
An example of this is that in science fiction universes, such as "Star Trek", humans are almost always the only species with multiple cultures; alien species are almost universally depicted as having a single, species-spanning culture.
ee also
*Group-serving bias
*List of cognitive biases
*Outgroup (sociology)
References
* Quattrone, G. A., & Jones, E. E. (1980). The perception of variability within in-groups and out-groups: Implications for the law of small numbers. "Journal of Personality and Social Psychology", 38, 141-152.
* Quattrone, G. A. (1986). On the perception of a group’s variability. In S. Worchel & W. G. Austin (eds.) "Psychology of intergroup relations", 2nd ed. Chicago: Nelson-Hall.
* [http://search.epnet.com/login.aspx?direct=true&db=pbh&an=7299108 Mullen, B. & Hu, L. (1989). Perceptions of ingroup and outgroup variability; A meta-analytic integration. "Basic and Applied Social Psychology", 10, 233-252.]
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