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Three experiments examined the impact of incidental emotions on implicit intergroup evaluations. Experiment 1 demonstrated that for unknown social groups, two negative emotions that are broadly applicable to intergroup conflict (anger and disgust) both created implicit bias where none had existed before. However, for known groups about which perceivers had prior knowledge, emotions increased implicit prejudice only if the induced emotion was applicable to the outgroup stereotype. Disgust increased bias against disgust-relevant groups (eg, homosexuals) but anger did not (Experiment 2); anger increased bias against anger-relevant groups (eg, Arabs) but disgust did not (Experiment 3). Consistent with functional theories of emotion, these findings suggest that negative intergroup emotions signal specific types of threat. If the emotion-specific threat is applicable to prior expectations of a group, the emotion …