Group-Induced Polarization in Simulated Juries

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Abstract
Group-induced shift effects observed on other response dimensions were extended to a simulated jury setting. Subjects first responded to eight hypothetical traffic cases which varied in the implication of guilt (high or low), then discussed half of these cases (two high guilt and two low guilt) in small groups, and finally responded again to all eight cases. As predicted, the simulated jury deliberations polarized the mean judgment of discussed cases. After discussing low guilt cases, subjects were, on the average, more extreme in their judgments of innocence and more lenient in recommended punishment, and after discussing high guilt cases shifted toward harsher judgments of guilt and punishment. These effects were not observed for cases which were not discussed.

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