Polarized Norms and Social Frames of Reference: A Test of the Self-Categorization Theory of Group Polarization

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Abstract
Self-categorization theory (Turner, 1985; Turner, Hogg, Oakes, Reicher, & Wetherell, 1987) explains group polarization as conformity to a polarized norem which defines one's own group in contrast to other groups within a specific social context. Whether the ingroup norm is polarized or not depends on the social comparative context within which the ingroup defines itself. It was predicted from self-categorization theory that an ingroup confronted by a risky outgroup will polarize toward caution, an ingroup confronted by a caution outgroup will polarize toward risk, and an ingroup in the middle of the social frame of reference, confronted by both risky and cautious outgroups, will not polarize but will converge on its pretest mean. Our experiment adopted a modified version of the risky-shift paradigm, in which subjects gave pretest, posttest, and group consensus recommendations on three choice dilemma item-types (risky, neutral, or risky). The frame of reference was manipulated by confronting the ingroup wi...

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