THE NUMBER OF DECISION MAKERS AND THE LEVEL OF RISK TAKING WITHIN A GROUP

概要

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The purpose of this study was to examine and make clear a riky shift phenomenon. In other words, it was attempted to explore the mechanism of diffusion of responsibility that was assumed to exist in a group decision-making situation, operating the extent to which the decision makers felt responsibility toward group members including themselves by varying the number of decision makers within the group.<BR>The task was to bet on simple probability preference. The subjects were 130 first-year students (15 to 16 years old) of a girls commercial high school. The results of this study can be summarized as follows.<BR>1. The larger the number of decision-makers within a group, i. e., the less responsibility they feel toward group members including themselves, the riskier the content of the decision.<BR>2. In cases where there is just one decision-maker within a group, the decision-maker's decision is more cautious than a personal decision prior to the group situation.<BR>The above results suggest that there exists a mechanism of diffusion of responsihility in a group discussion situation and that a risky shift phenomeon is caused by that mechanism.
日本グループ・ダイナミックス学会の論文