Conversational Technique
nSpeech based interfaces also need to address problems arising from clarification, back-channel utterances,
dialog repair, turn taking,
and topic introduction.
qClarification – repetition of the same command request
using new syntax
qBack-channel utterances – “uh huh”, “um”, and “ah”
qDialog repair – pause in speech to backtrack and
rephrase input
qTurn taking – human-computer speech interfaces require complete input commands versus interactive commands
common in human-human
interaction
qTopic introduction – can change the semantic meaning of syntactically similar commands
nThe conclusion of an input command utterance also more ambiguous in speech based input