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Managing extrinsic costs via multimodal natural interaction systems Export

edited by: Robert J. K. Jacob

In CHI 2006 Workshop: What is the next generation of human-computer interaction?, Vol. TR-2006-3 (April 2006), pp. 134-137.

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Modern day interactions, whether between remote humansor humans and computers, involve extrinsic costs to theparticipants. Extrinsic costs are activities that, althoughunrelated to a person’s primary task, must be accomplishedto complete the primary task. In this paper we provide aframework for discussing certain extrinsic costs bydescribing those we term over-specification, repetition, andinterruption. Natural interaction systems seek to reduce oreliminate these costs by leveraging peoples’ innatecommunication abilities. However, in conceiving theseinterfaces, it’s critical to acknowledge that humans arenaturally multimodal communicators, using speech, gesture,body position, gaze, writing, etc., to share information andintent. By recognizing and taking advantage of humans’innate ability to communicate multimodally, extrinsicinteraction costs can be reduced or eliminated. In this paperwe review previous and ongoing work that demonstrateshow multimodal interfaces can reduce extrinsic costs.


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