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Multimodal Cues: Exploring Pause Intervals between Haptic/Audio Cues and Subsequent Speech Information
Abstract
There are numerous challenges to accessing user assistance information in mobile and ubiquitous computing scenarios. For example, there may be little-or-no display real estate on which to present information visually, the user’s eyes may be busy with another task (e.g., driving), it can be difficult to read text while moving, etc. Speech, together with non-speech sounds and haptic feedback can be used to make assistance information available to users in these situations. Non-speech sounds and haptic feedback can be used to cue information that is to be presented to users via speech, ensuring that the listener is prepared and that leading words are not missed. In this chapter, we report on two studies that examine user perception of the duration of a pause between a cue (which may be a variety of non-speech sounds, haptic effects or combined non-speech sound plus haptic effects) and the subsequent delivery of assistance information using speech. Based on these user studies, recommendations for use of cue pause intervals in the range of 600 ms to 800 ms are made.
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