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Voice User Interface Design by Jennifer Balogh, James P. Giangola, Michael H. Cohen

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Chapter 10. Designing Prompts

A VUI dialog is a type of conversation. Perhaps this is even more the case for telephony-based VUIs; after all, the telephone itself is an icon of conversation in modern culture. Even though one of the participants in a VUI dialog is a machine, both the user and the designer who engineered the dialog share a few basic expectations that also hold for human-to-human conversations. Both parties expect the use of a common language; each expects the other to be cooperative; and each expects that the other will possess basic cognitive faculties such as intelligence, short-term memory, and an attention span (which are artificial in the case of the machine but are nonetheless expected). Another level of expectation is implicit ...

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