Metaphor

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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]

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.

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]

Desktop metaphor
[L. Allison, 1995]

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]

Metaphor is used widely in graphical user interfaces to help set users' expectations and make the behavior of computers clearer. The 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. 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]

References

• [Dürsteler, 2002]: Juan C. Dürsteler, Visual Metaphors, 2002.
• [Saffer, 2005]: Dan Saffer, The Role of Metaphor in Interaction Design, Master's thesis, Carnegie Mellon University, Pittsburgh, USA, 2005.
• [Usability First, 2003]: Usability First, [http://u1st.diamondbullet.com/glossary/main.cgi?function=display_term