The tendency of a group to spend more time discussing information that several (two or more) group members know than information that is known by fewer members is called the effect.

Shared information bias.

Explanation:

Shared information bias is a group's tendency to discuss information that is shared by most members of the group, that is, information that is familiar to most of them. Discussing information that is unknown to most of the group members can be enlightening, but this tendency to discuss what is already shared is a strategy to reach consensus and avoid poor decision-making.

nasa 3

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