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The purpose of this study is to test Davis’s (1996) Social Judgment Scheme (SJS) model, which was proposed as a predictive model of group decision making with continuous alternatives. The SJS model assumes that individual group members’ influence on the group decision exponentially declines with the distance from other members’ judgments (i.e. majority influence process). Fifty-five 3-person groups engaged in eight group polarization tasks. First, the model fits of the SJS model and the Averaging model were compared in terms of the predictive accuracy. Results indicted that the SJS model yielded accurate predictions more often than the Averaging model. Second, a different analytical approach confirmed the model’s corollary—the skewness of individual judgments distribution was negatively correlated with the direction of group polarization. These findings support the model’s assumption of majority influence process in continuous alternatives tasks.

Recent research on consumption and subjective well-being has revealed that experiential purchases and prosocial spending promote happiness by enhancing the purchasers' social relationships. This study (N = 1,523) explored whether undergraduate students' consumption behaviors during summer break would be associated with their post-break happiness, and whether the consumption-happiness relationship would be mediated by a positive influence on their social relationships. The results showed that both experiential purchases and prosocial spending during summer break were associated with greater post-break happiness, but only when these purchases had a positive influence on the purchasers' social relationships. These effects remained significant after controlling for respondents' personality traits, financial standing, and sex. Moreover, both experiential purchases and prosocial spending were more likely to have a positive influence on social relationships than luxury purchases. These results are congruent with the recent exposition that experiential purchases and prosocial spending promote happiness by enhancing the purchasers' social relationships.

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