Positive–Negative Asymmetry in Social Discrimination

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Abstract
Minimal group experiments showed that mere categorization of individuals into arbitrary social groups can be sufficient to elicit ingroup favouritism. This effect has been qualified by demonstrating a positive–negative asymmetry in social discrimination: categorization into minimal, laboratory groups was sufficient to elicit ingroup favouritism in allocations of positive stimuli, but not in allocations of negative ones. Different explanatory perspectives for this valence-specific asymmetry in intergroup behaviour were tested. An integrative perspective linking normative, cognitive and motivational aspects is proposed. This perspective also implies a critical analysis and re-framing of traditional theorizing on categorization effects in minimal intergroup situations.