Modality (human–computer interaction): Difference between revisions

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{{distinguish|Mode (computer interface)}}

In the context of [[human–computer interaction]], a '''modality''' is the classification of a single independent channel of sensory [[input/output]] between a computer and a human.<ref name="HCI Overview2">{{cite journal|last1 = Karray|first1 = Fakhreddine|last2 = Alemzadeh|first2 = Milad|last3 = Saleh|first3 = Jamil Abou|last4 = Arab|first4 = Mo Nours|title = Human-Computer Interaction: Overview on State of the Art|journal = International Journal on Smart Sensing and Intelligent Systems|date = March 2008|volume = 1|issue = 1|url = http://www.s2is.org/issues/v1/n1/papers/paper9.pdf|accessdate = April 21, 2015}}</ref>

A system is designated unimodelunimodal if it has only one modality implemented, and multimodelmultimodal if it has more than one.<ref name="HCI Overview2" /> When multiple modalities are available for some tasks or aspects of a task, the system is said to have overlapping modalities. If multiple modalities are available for a task, the system is said to have redundant modalities. Multiple modalities can be used in combination to provide complementary methods that may be redundant but convey information more effectively.<ref>{{Cite book|title = Interactive Systems. Design, Specification, and Verification|last = Palanque|first = Philippe|publisher = Springer Science & Business Media|year = 2001|isbn = 9783540416630|___location = |pages = 43|last2 = Paterno|first2 = Fabio|url = https://books.google.com/books?id=RddIwyhAvDAC&dq=}}</ref> Modalities can be generally defined in two forms: human-computer and computer-human modalities.

==Computer–Human Modalities==