Answer:
Triplett is the correct answer.
Step-by-step explanation:
Norman Triplett was an American psychologist born in Perry, Illinois. His experiment, social facilitation effect, is considered as the first one in sports psychology. There, Triplett noticed that cyclists were faster when they faced each other instead of just running alone. He did a similar experiment with children, by setting some tasks in a laboratory. First, he made them work alone and then in pairs. In both experiments, people performed better when they were surrounded by others than when they were by themselves.