Shared Information Bias is best described by which statement?

• A. Groups tend to spend more time discussing information that only some members know.
• B. Groups tend to discuss information that is incorrect.
• C. Groups tend to spend less time discussing information that all members know.
• D. Groups tend to spend more time discussing information that all members know and less time examining information known by only a few.

Answer: (D)

Shared Information Bias shows up when a group tends to emphasize information that everyone already knows and glosses over information that only some members know. The statement describing spending more time on what all members know and less on what only a subset knows captures that pattern precisely: common knowledge gets airtime, while unique insights are underexplored. This happens for reasons like social ease, desire to avoid conflict, time pressure, or assuming others have already considered the niche information. The result is suboptimal decisions because important, less-shared information may be left out of the discussion. The other descriptions don’t fit: focusing on information that’s incorrect isn’t the bias, and implying the group spends less time on widely shared information or spends more on information known by only some would contradict the defining behavior of prioritizing shared over unshared information.