Fads can fit under the broad umbrella of
collective behavior, which are behaviors engaged in by a large but loosely connected group of people. Other than fads, collective behavior includes the activities of people in
crowds, panics,
fashions, crazes, and more.
Robert E. Park, the man who created the term collective behavior, defined it as "the behavior of individuals under the influence of an impulse that is common and collective, an impulse, in other words, that is the result of social interaction". Fads are seen as impulsive, driven by emotions; however, they can bring together groups of people who may not have much in common other than their investment in the fad. == Collective obsession ==