Social facilitation is most likely to occur when individuals

A) have had relatively little practice.
B) are alone.
C) are novices.
D) have mastered the task they are performing.

Answer: D
Rationale: Social facilitation occurs when an individual's performance is better in the presence of others than when alone. As a general rule, the presence of others is most likely to lead to social facilitation when a person is prepared for a task. That is, when individuals have mastered a task, the audience helps, whereas for novices, having an audience can actually hurt performance.