Final answer:
In a study conducted by Triplett, it was found that children reeled in a fishing line faster when in the presence of another child engaged in the same activity than when alone. This is an example of social facilitation.
Step-by-step explanation:
In what is typically regarded as the FIRST social psychological EXPERIMENT, Triplett (1898) found that children reeled in a fishing line faster when in the presence of another child engaged in the same activity than when alone. This result is an example of social facilitation, which refers to the tendency for people to perform better on simple or well-practiced tasks in the presence of others.