A reactive approach to explanation

  • Authors:
  • Johanna D. Moore;William R. Swartout

  • Affiliations:
  • University of California, Los Angeles and USC, Information Sciences Institute, Marina del Rey, CA;USC, Information Sciences Institute, Marina del Rey, CA

  • Venue:
  • IJCAI'89 Proceedings of the 11th international joint conference on Artificial intelligence - Volume 2
  • Year:
  • 1989

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Abstract

Explanation is an interactive process, requiring a dialogue between advice-giver and advice-seeker. Yet current expert systems cannot participate in a dialogue with users. In particular these systems cannot clarify misunderstood explanations, elaborate on previous explanations, or respond to follow-up questions in the context of the on-going dialogue. In this paper, we describe a reactive approach to explanation - one that can participate in an on-going dialogue and employs feedback from the user to guide subsequent explanations. Our system plans explanations from a rich set of explanation strategies, recording the system's discourse goals, the plans used to achieve them, and any assumptions made while planning a response. This record provides the dialogue context the system needs to respond appropriately to the user's feedback. We illustrate our approach with examples of disambiguating a follow-up question and producing a clarifying elaboration in response to a misunderstood explanation.