Expert pool players were observed to make 71 percent of their shots when alone. When four people watched them, they made 80 percent of their shots. This best illustrates

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The increase in performance when others are watching is an example of social facilitation. The expert pool players performed better in the presence of an audience, which is a common phenomenon in many areas of performance. Group polarization involves a shift in attitudes or behavior that occurs in a group setting, and the bystander effect refers to the decreased likelihood of individuals to intervene in an emergency when other people are present. The mere exposure effect describes the phenomenon of increased liking for a stimulus as a result of having seen it before. None of these concepts are relevant to the observed increase in pool player performance in the presence of an audience.

Expert Pool Players Were Observed to Make 71 Percent of Their