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<p>Telephone-based, spoken-language dialogue systems have been entering the market since the early 1990s. Because they provide such significant cost reductions, the market for these systems is growing rapidly. However, the designers of the dialogue these systems employ do not have a set of principles to guide them. Today's designers tend to rely on common sense, experience, intuition, and trial and error. This means they must be both very careful and very lucky, or humans will have problems interacting with the system, and development costs will rise. </p> <p>This article contains a comprehensive set of dialogue design guidelines. The guidelines could significantly reduce development time and cost by removing dialogue problems as early as possible in the design life cycle, mitigating the need for lengthy experimentation, controlled user testing, and field trial cycles. </p>

N. Ole Bernsen, L. Dybkjær and H. Dybkjær, "What Should Your Speech System Say?," in Computer, vol. 30, no. , pp. 25-31, 1997.
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