This chapter reviews research on the group identity explanation of social influence, grounded in self-categorization theory, and contrasts it with other group-based explanations, including normative interdependence, network approaches, as well approaches to persuasion influence that background (identity) processes. Although review primarily discusses recent research, its focus also invites reap...

Empirically, the formation of political attitudes has been strongly linked to the concept of group identification. Classifications such as race, gender, religion and ethnicity have been shown to be sharp predictors of many aspects of political life including who turns out to vote, how people vote, and the issues that are important to people. Furthermore, many topics that are of interest to poli...

Identity is a central concept in the social sciences. In this study, we present a laboratory experiment that measures the effects of induced group identity on participant social preferences. We find that when participants are matched with an ingroup member (as opposed to an outgroup member) they show a 47% increase in charity concerns when they have a higher payoff and a 93% decrease in envy wh...

Identity is a central concept in the social sciences. In this study, we present a laboratory experiment that measures the effects of induced group identity on participant social preferences. We find that when participants are matched with an ingroup member (as opposed to an outgroup member) they show a 47% increase in charity concerns when they have a higher payoff and a 93% decrease in envy wh...

Objective. Group identity is a central concept in many social science disciplines. We investigate why people identify with groups and show favoritism to in-group members. We anticipate group identifications are substantially influenced by genes and social environments, likely working through stable personality traits. Methods. Using twin study data from the National Survey of Midlife Developmen...