Horn effect
Form of cognitive bias / From Wikipedia, the free encyclopedia
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The horn effect, closely related to the halo effect, is a form of cognitive bias that causes one's perception of another to be unduly influenced by a single negative trait.[1][2][3] An example of the horn effect may be that an observer is more likely to assume a physically unattractive person is morally inferior to an attractive person, despite the lack of relationship between morality and physical appearance.[4][5]