Sequential models of intergroup contact and social categorization: An experimental field test of integrated models

Research has proposed different models of how contact situations should be structured to maximize contact effects, focusing in particular on the role of categorization during contact. We conducted two experimental field interventions (Ns = 247 and 247) to test models that integrate different levels of categorization. Each of the tested models was contrasted against a no-intervention control condition. In both studies, we assessed effects shortly after the intervention (1 week later; i.e., posttest) and then after approximately 6 months (i.e., follow-up). In the first study, results generally supported the model where categorization precedes decategorization, showing effects on major dependent measures highlighted in research on intergroup contact: quantity and quality of contact, cross-group friendships, intergroup anxiety (marginal effect at follow-up), outgroup attitudes (only at follow-up). Evidence for follow-up effects for this model was, however, weaker in Study 2, where the delayed effects of the intervention emerged only indirectly, via changes in contact quality, outgroup attitudes, and approach behavioral intentions at posttest. Comparisons of the other two models (decategorization then categorization; and simultaneous categorization and decategorization) with the control condition (only in Study 1) provided weaker and inconsistent results.