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| These help messages are often based on the more concise messages played as reprompts for noinput and nomatch events, but tend to be a bit more verbose, covering a wider range of help information than the reprompts. | These help messages are often based on the more concise messages played as reprompts for noinput and nomatch events, but tend to be a bit more verbose, covering a wider range of help information than the reprompts. | ||
| - | A related help strategy is to reuse the planned sequence of noinput/nomatch messages. "In some specific cases it might be necessary to treat help, nomatch, and noinput events differently, but those are the exceptions. Usability testing in our lab has shown, however, that callers who say 'Help' once do not expect the system to provide different messages or reprompts as a result of saying 'Help' again. for this reason, it is a good practice to modify the duration of noinput timeouts for that dialog step from the standard 7 seconds to 3 seconds following an explicit request for help. This increases the likelihood that the caller who has requested help will hear the help message appropriate to the situation" (Lewis, 2011, p. 194). | + | A related help strategy is to reuse the planned sequence of noinput/nomatch messages. "In some specific cases it might be necessary to treat help, nomatch, and noinput events differently, but those are the exceptions. Usability testing in our lab has shown, however, that callers who say 'Help' once do not expect the system to provide different messages or reprompts as a result of saying 'Help' again. for this reason, it is a good practice to modify the duration of noinput timeouts for that dialog step from the standard 7 seconds to 3 seconds following an explicit request for help. This increases the likelihood that the caller who has requested help will hear the help message appropriate to the situation" ([[references#lewis2011|Lewis, 2011]], p. 194). |
| ==== References ==== | ==== References ==== | ||
| Lewis, J. R. (2011). Practical speech user interface design. Boca Raton, FL: CRC Press, Taylor & Francis Group. | Lewis, J. R. (2011). Practical speech user interface design. Boca Raton, FL: CRC Press, Taylor & Francis Group. | ||