When groups get together for discussions, their decisions tend to be more extreme than any one member would have made alone. This phenomenon is known as:

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Group polarization refers to the tendency for group decisions to be more extreme than individual decisions. This occurs because group discussion tends to strengthen prevailing attitudes and beliefs, leading members to take more extreme positions than they might have otherwise. The common knowledge effect refers to the tendency for group discussions to focus on information that is widely known, while overlooking information that is unique to individual members. Group relativity is not a recognized phenomenon. Diffusion of responsibility occurs when individuals feel less responsible for their actions when in a group, leading to decreased likelihood of helping behavior.

When Groups Get Together for Discussions, Their Decisions Tend to Be