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| + | A '''contrast effect''' is the enhancement or diminishment, relative to normal, of a [[perception]] and related performance as a result of immediately previous or simultaneous exposure to a [[stimulus]] of lesser or greater value in the same dimension. (In this definition a "normal" perception is one free of immediate related context, greater or lesser, more appealing or less appealing.) |
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| + | Contrast effects are ubiquitous throughout human and non-human animal perception, [[cognition]], and resultant performance. A hefted weight is perceived as heavier than normal when "contrasted" with a lighter weight. It is perceived as lighter than normal when contrasted with a heavier weight. An animal works harder than normal for a given amount of [[reward]] when that amount is contrasted with a lesser amount and works less energetically for that given amount when it is contrasted with a greater amount. A person appears more appealing than normal when contrasted with a person of less appeal and less appealing than normal when contrasted with one of greater appeal. |
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| + | [[Category:Cognition]] |
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| + | [[Category:Perception]] |
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| + | [[Category:Cognitive biases]] |
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Revision as of 17:46, 15 February 2006
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Cognitive Psychology: Attention · Decision making · Learning · Judgement · Memory · Motivation · Perception · Reasoning · Thinking - Cognitive processes Cognition - Outline Index
A contrast effect is the enhancement or diminishment, relative to normal, of a perception and related performance as a result of immediately previous or simultaneous exposure to a stimulus of lesser or greater value in the same dimension. (In this definition a "normal" perception is one free of immediate related context, greater or lesser, more appealing or less appealing.)
Contrast effects are ubiquitous throughout human and non-human animal perception, cognition, and resultant performance. A hefted weight is perceived as heavier than normal when "contrasted" with a lighter weight. It is perceived as lighter than normal when contrasted with a heavier weight. An animal works harder than normal for a given amount of reward when that amount is contrasted with a lesser amount and works less energetically for that given amount when it is contrasted with a greater amount. A person appears more appealing than normal when contrasted with a person of less appeal and less appealing than normal when contrasted with one of greater appeal.