This chapter helps you deal with cognitive challenges involved in voice user interface design, including conceptual complexity, memory load, and attention. As with all design guidelines, they must be applied with careful consideration of context.
Developing a VoiceXML IVR is straightforward. Designing a quality speech interface, on the other hand, is a long road paved with assumptions, mistakes and failures. Read Jonathan's 10 best practices for VUI design and learn from his mistakes before you fall into the same traps.
The XWand is a novel wireless sensor package that enables styles of natural interaction with intelligent environments. For example, a user may point the wand at a device and control it using simple gestures. The XWand system leverages the intelligence of the ubiquitous computing environment to best determine the user's intention.