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Fan effect
The fan effect is a psychological phenomenon under the branch of cognitive psychology where recognition times or error rate for a particular concept increases as more information about the concept is acquired. The word "fan" refers to the number of associations correlated with the concept.
== The Origin of the Fan Effect ==
The fan effect made its first appearance in a series of experiments conducted by John R. Anderson, a cognitive psychologist, in 1974. The three experiments he conducted involved participants learning 26 sentences that paired a person with a location. Additionally, they were asked to determine whether or not a particular sentence that was given to them belonged to the 26 they were asked to study. An example of a sentence Anderson used in his experiment was: "A hippie is in the park." Some sentences seemed similar in the sense that a person was paired with another location. For instance, "A hippie is in the church." Results revealed that participants produced a longer retrieval time when a person was paired with more than one location. Overall, these experiments demonstrated that multiple associations, such as including a large number of nouns in a sentence, interfered with the recognition time by producing a much slower effect.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Fan effect」の詳細全文を読む
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