Norman Triplett accurately predicted that bicycle-racing times would be faster when individuals raced in groups. This effect is currently explained by the modern construct of

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Norman Triplett's observation is now explained by the social facilitation theory, which suggests that the presence of other people enhances an individual's performance on simple or well-practiced tasks. In the case of bicycle racing, group presence creates arousal, leading to improved performance.

Norman Triplett Accurately Predicted That Bicycle-Racing Times Would Be Faster