Three experiments investigated how perceived foreign threats to the United States can influence Americans' endorsement of assimilation and multiculturalism as models for foreign and domestic intergroup relations. The initial study, conducted during the 6-month anniversary of the September 11, 2001, terrorist attacks (9/11), discovered that a diverse group of Americans preferred assimilation as ...

Reminders of in-group wrongdoing can prompt defensive responses that affect intergroup relations. Across two studies, American participants were randomly assigned to have their American identity increased (or not), then read a passage describing the negative treatment of Native American Indians by perpetrators described as either early Americans (i.e., in-group members) or European settlers (i....

We propose that social categorization can encourage particular forms of intergroup cooperation because it differentiates a group in need from a group that can give aid. Moreover, social categorization is most likely to occur when individuals perceive procedural justice (i.e., fair treatment) from authorities in a superordinate group that includes the individuals' subgroup. Two field studies inv...

In this review, we highlight the importance of understanding diversity ideologies, or people’s beliefs and practices regarding diversity, for social psychological research on intergroup relations. This review focuses on two diversity ideologies, colorblindness and multiculturalism, and their impact on core issues related to intergroup conflict, such as stereotypes, prejudice, attitudes toward i...