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Journal of Automated Reasoning

, Volume 32, Issue 3, pp 187–226 | Cite as

Abductive Theorem Proving for Analyzing Student Explanations to Guide Feedback in Intelligent Tutoring Systems

  • Maxim Makatchev
  • Pamela W. Jordan
  • Kurt VanLehn
Article

Abstract

The Why2-Atlas tutoring system presents students with qualitative physics questions and encourages them to explain their answers through natural language. Although there are inexpensive techniques for analyzing explanations, we claim that better understanding is necessary for use within tutoring systems. In this paper we motivate and describe how the system creates and uses a deeper proof-based representation of student essays in order to provide students with substantive feedback on their explanations. We describe in detail the abductive reasoner, Tacitus-lite+, that we use within the tutoring system. We also discuss evaluation results for an early version of the Why2-Atlas system and a subsequent evaluation of the theorem-proving module. We conclude with the discussion of work in progress and additional future work for deriving more benefits from a proof-based approach for tutoring applications.

intelligent tutoring systems abductive reasoning qualitative physics 

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Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  • Maxim Makatchev
    • 1
  • Pamela W. Jordan
    • 1
  • Kurt VanLehn
    • 1
  1. 1.Learning Research and Development CenterUniversity of PittsburghPittsburghU.S.A. e-mail

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