Mere arbitrary classification into categories produces in-group bias

Evidence

In a laboratory setting, experiments with the so-called minimal intergroup situation provided a powerful demonstration that merely classifying individuals into arbitrary distinct social categories was sufficient to produce in-group– out-group discrimination and bias, even in the absence of any interactions with fellow group members or any history of competition or conflict between the groups. — Roderick M. Kramer, Geoffrey J. Leonardelli, Robert W. Livingston, Social Cognition, Social Identity, and…, 2481

Obviously, bias often is manifested in response to the mere classification of people into separate groups (Brewer, 1979; Brewer & Silver, 1978; Messick & Mackie, 1989; Tajfel, 1970); however, this bias is not inevitable. Even young children when asked to make direct comparisons between their in-group and an out-group made judgments that indicated the emergence of in-group positivity in the absence of outgroup negativity (Kowalski, 2003). — Roderick M. Kramer, Geoffrey J. Leonardelli, Robert W. Livingston, Social Cognition, Social Identity, and…, 1402

Obviously, bias often is manifested in response to the mere classification of people into separate groups (Brewer, 1979; Brewer & Silver, 1978; Messick & Mackie, 1989; Tajfel, 1970); however, this bias is not inevitable. Even young children when asked to make direct comparisons between their in-group and an out-group made judgments that indicated the emergence of in-group positivity in the absence of outgroup negativity (Kowalski, 2003). … Bennett et al. (2004) have argued that out-group derogation toward out-group nationalities was not a requisite component for the formation of the positivity bias among youth reporting high favoritism or excessively positive attitudes about their own (in-group) nationality. These results are consistent with the findings of Mummendey et al. (1992), who showed that although individuals may actively seek to allocate benefits in a manner that advantages the in-group, they are disinclined to cause harm to the out-group. — Roderick M. Kramer, Geoffrey J. Leonardelli, Robert W. Livingston, Social Cognition, Social Identity, and…, 1402

Categorization

• DEFINE: Defines the ‘minimal intergroup situation’ paradigm central to social identity theory.
• XREF: Connects to Tajfel and Turner’s social identity theory, and to the law merchant/group reputation findings — mere membership markers trigger differential treatment.
• DEEPTHINKING: Suggests a two-factor architecture of prejudice: in-group favoritism and out-group harm are dissociable processes, relevant to why some intergroup animus (e.g., Islamophobia) is harm-driven while other identity dynamics are not — a distinction worth sitting with.
• corroborated: 5 independent passages support this claim — Roderick M. Kramer, Geoffrey J. Leonardelli, Robert W. Livingston, Social Cognition, Social Identity, and…, 2481; Roderick M. Kramer, Geoffrey J. Leonardelli, Robert W. Livingston, Social Cognition, Social Identity, and…, 1402