Effects of variable initiative on linguistic behavior in human-computer spoken natural language dialogue

  • Authors:
  • Ronnie W. Smith;Steven A. Gordon

  • Affiliations:
  • East Carolina University;East Carolina University

  • Venue:
  • Computational Linguistics
  • Year:
  • 1997

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Abstract

This paper presents an analysis of the dialogue structure of actual human-computer interactions. The 141 dialogues analyzed were produced from experiments with a variable initiative spoken natural language dialogue system organized around the paradigm of the Missing Axiom Theory for language use. Results about utterance classification into subdialogues, frequency of user-initiated subdialogue transitions, regularity of subdialogue transitions, frequency of linguistic control shifts, and frequency of user-initiated error corrections are presented. These results indicate there are differences in user behavior and dialogue structure as a function of the computer's level of initiative. Furthermore, they provide evidence that a spoken natural language dialogue system must be capable of varying its level of initiative in order to facilitate effective interaction with users of varying levels of expertise and experience.