Iconic interfaces in operating systems and hypermedia knowledge bases have become the default standard. The content, purpose, or function implied by icons may be enhanced by making them more dynamic. Dynamlcons can use representational, abstract, or symbolic graphics to convey the categorical or functional information or inferences and implications about its referent. Conveying more information in the design of icons can make iconic interfaces even more efficient.
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Jonassen et al. (1996) studied this question.