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Herd behavior
Herd behavior describes how individuals in a group can act collectively without centralized direction. The term can refer to the behavior of animals in herds, packs, bird flocks, fish schools and so on, as well as the behavior of humans in demonstrations, riots and general strikes,〔Braha, D (2012) ''Global Civil Unrest: Contagion, Self-Organization, and Prediction.'' PLoS ONE 7(10): e48596, (article ) 〕 sporting events, religious gatherings, episodes of mob violence and everyday decision-making, judgement and opinion-forming.
Raafat, Chater and Frith proposed an integrated approach to herding, describing two key issues, the mechanisms of transmission of thoughts or behavior between individuals and the patterns of connections between them. They suggested that bringing together diverse theoretical approaches of herding behavior illuminates the applicability of the concept to many domains, ranging from cognitive neuroscience to economics.
==In animals==
A group of animals fleeing from a predator shows the nature of herd behavior. In 1971, in the oft cited article "Geometry For The Selfish Herd," evolutionary biologist W. D. Hamilton asserted that each individual group member reduces the danger to itself by moving as close as possible to the center of the fleeing group. Thus the herd appears as a unit in moving together, but its function emerges from the uncoordinated behavior of self-serving individuals.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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