Yarema is a cyclist. He notices that whenever he trains with someone else, his time improves markedly. In the context of group behavior, this phenomenon occurs due to a process known as _________.

A) social facilitation
B) social loafing
C) polarization
D) groupthink

Social facilitation is the phenomenon whereby people tend to perform better on simple tasks when they are in the presence of others. This effect is most likely to occur when the tasks are relatively easy and the individual is being watched by others. In the case of Yarema, his improved performance while training with someone else can be attributed to social facilitation.