We hypothesized that group members' attitudes towards an out-group are negatively related to the in-group's perceived relative prototypicality for a superordinate category, but only if both the in-group and out-group are included in this superordinate category. In Experiment 1 (N = 40), Germans' attitudes towards Poles were negatively correlated with the relative prototypicality of Germans when "Europe" (including Poles), but not when "West-Europe" (excluding Poles), was the superordinate category. In Experiment 2 (N = 63), female single parents' attitudes about the competence of single parents to raise children depended on the in group's relative prototypicality for "single parents" (including fathers), but not on their relative similarity to "mothers" (excluding fathers). Both experiments showed that inclusion in a superordinate category had a more negative influence on attitudes towards the out-group when relative in-group prototypicality is high rather than low.

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• Psicologia - Ciências Sociais