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| {{Definition|In [[information visualization]] the term '''metaphor''' refers to the representation of a system by means of (visual) attributes corresponding to a different system, familiar to the user, that behaves in a similar way: The use of one idea or object to represent another; making an implicit comparison between concepts to provide insight into those concepts. [Usability First, 2003]}}
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| Stimulating the viewer to use knowledge from previous experiences for their interpretation, visual metaphors drastically ease a visualization's handling. For reasons of greater intuitivity and broad acceptance, they are often built upon real world analogues present in everyday life.
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| {{Quotation|The visual metaphor can be defined as the representation of a new system by means of visual attributes corresponding to a different system, familiar to the user, that behaves in a similar way.|[Dürsteler, 2002]}}
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| [[Image:desktopmetaphor.jpg|thumb|left|250px|Desktop metaphor<br>[L. Allison, 1995]]]
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| {{Quotation|Metaphors help us to conceive and understand abstract concepts like time, usually by making reference to more concrete objects (e.g. Time is money). | [Saffer, 2005]}}
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| {{Quotation|Metaphor is used widely in graphical user interfaces to help set users' expectations and make the behavior of computers clearer. The [[Wikipedia:Desktop_metaphor|desktop metaphor]] is used to suggest that a computer screen is like a physical desk, with papers and folders to shuffle around and various desk accessories, such as calculators, printers, and notepads. A general physical world metaphor is what allows a beveled border to suggest a button and allows close parallel lines to suggest that something is draggable.
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| Metaphors are also useful for designers to explore representations of concepts and the behavior of interface elements. Designers may also apply wild and unrelated metaphors as a useful brainstorming device. |[Usability First, 2003]}}
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| == References ==
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| *[Dürsteler, 2002]: Juan C. Dürsteler, [http://www.infovis.net/E-zine/2002/num_91.htm ''Visual Metaphors''], 2002.
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| *[Saffer, 2005]: Dan Saffer, [http://www.odannyboy.com/blog/cmu/new_archives/the_role_of_metaphor_in_interaction_design.html ''The Role of Metaphor in Interaction Design''], Master's thesis, Carnegie Mellon University, Pittsburgh, USA, 2005.
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| *[Usability First, 2003]: [http://www.usabilityfirst.com ''Usability First''], [http://u1st.diamondbullet.com/glossary/main.cgi?function=display_term&term_id=195 ''Metaphor''], viewed at: May 24th, 2003.
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| [[Category: Glossary]]
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