Comparison of Speech Input and Manual Control of In-Car Devices while on the Move

摘要

Speech recognition has a number of potential advantages over traditional manual controls for the operation of in-car and other mobile devices. Two laboratory experiments aimed to test these proposed benefits, and to optimise the design of future speech interfaces. Participants carried out tasks with a phone or in-car entertainment system, while engaged in a concurrent driving task. Speech input reduced the adverse effects of system operation on driving performance, but manual control led to faster transaction times and improved task accuracy. Explicit feedback of the recognition results was found to be necessary, with audio-only feedback leading to better task performance than combined audio-plus-visual. It is recommended that speech technology is incorporated into the user interface as a redundant alternative to manual operation. However, the importance of good human factors in the design of speech dialogues is emphasized.