Common-information bias is the inclination to overemphasize information held by the majority of group members while failing to consider other perspectives held by the minority.

Question

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Common-information bias refers to the tendency of group members to focus and give more weight to information that everyone in the group knows (common information), while undervaluing or ignoring information that is only available to a few members of the group (unique information). This can lead to suboptimal decision-making as important perspectives or data held by the minority may be overlooked.

Common-Information Bias Is the Inclination to Overemphasize Information Held by the Majority