A term coined by Floyd Allport, social facilitation refers to a social phenomenon that presence of others may produce enhanced performance in individuals (Hogg & Cooper, 2007). This phenomenon could be complicated because the presence of others sometimes facilitates performance but sometimes hinders.
Hogg, M. A., & Cooper, J. (Eds.). (2007). The sage handbook of social psychology: Concise student edition. Thousand Oaks, CA: Sage.