The other side of we: when outgroup members express common identity.Pers Soc Psychol Bull. 2008 Dec; 34(12):1613-26.PS
Previous research on the common ingroup identity model has focused on how one's representations of members of the ingroup and outgroup influence intergroup attitudes. Two studies reported here investigated how learning how others, ingroup or outgroup members, conceive of the groups within a superordinate category affects intergroup bias and willingness to engage in intergroup contact. Across both studies, high school students who learned that other ingroup members categorized students at both schools within the common identity of "students" showed less intergroup bias in evaluations and greater willingness for contact. However, consistent with the hypothesized effects of identity threat, when participants read that outgroup members saw the groups within the superordinate category, they exhibited a relatively negative orientation, except when ingroup members also endorsed a superordinate identity (Study 1). This result occurred even when the relative status of the groups was manipulated (Study 2).