"Collective effervescence is a perceived energy formed by a gathering of people as might be experienced at a sporting event, a carnival, a rave, or a riot. This energy can cause people to act differently than in their everyday life.
Collective effervescence is the emotion web site owners want to bring. Collective effervescence represents one word---hype! Collective effervescence is the ultimate goal of implementing collectivism on the Web. At the same time, how much an implementation of collectivism successfully brings collective effervescence into a web site is the fundamental standard that we can measure the quality of the implementations of collectivism. This concept encloses the entire set of collective factors and upgrades the evaluation of collectivism into the computational realm." (http://yihongs-research.blogspot.com/2007/12/collectivism-on-web.html)