Broadening the definition of ingroup reduces intergroup bias

Evidence

Recategorization can occur by making people aware that outgroup members are also members of one’s own group on a different dimension (e.g., by having one dimension, such as sex, cross-cut another dimension, such as arts and science majors; Urban & Miller, 1998). Alternatively, recategorization may be accomplished by restructuring categorization at a higher level of inclusiveness (e.g., by creating a new group membership or emphasizing an existing common group membership, such as corporate or national identity, that encompasses previous group memberships, such as race), thereby reducing the salience of the original ingroup–outgroup distinction (Gaertner & Dovidio, 2000). — , Rudman, Laurie A - On the Nature of…, 563