DT tutor: A decision-theoretic, dynamic approach for optimal selection of tutorial actions

R. Charles Murray, Kurt VanLehn

Research output: Chapter in Book/Report/Conference proceedingConference contribution

35 Scopus citations

Abstract

DT Tutor uses a decision-theoretic approach to select tutorial actions for coached problem solving that are optimal given the tutor’s beliefs and objectives. It employs a model of learning to predict the possible outcomes of each action, weighs the utility of each outcome by the tutor’s belief that it will occur, and selects the action with highest expected utility. For each tutor and student action, an updated student model is added to a dynamic decision network to reflect the changing student state. The tutor considers multiple objectives, including the student’s problem-related knowledge, focus of attention, independence, and morale, as well as action relevance and dialog coherence. Evaluation in a calculus domain shows that DT Tutor can select rational and interesting tutorial actions for real-world-sized problems in satisfactory response time. The tutor does not yet have a suitable user interface, so it has not been evaluated with human students.

Original languageEnglish (US)
Title of host publicationLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
PublisherSpringer Verlag
Pages153-162
Number of pages10
Volume1839
ISBN (Print)3540676554
StatePublished - 2000
Externally publishedYes
Event5th International Conference on Intelligent Tutoring Systems, ITS 2000 - Montreal, Canada
Duration: Jun 19 2000Jun 23 2000

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume1839
ISSN (Print)03029743
ISSN (Electronic)16113349

Other

Other5th International Conference on Intelligent Tutoring Systems, ITS 2000
CountryCanada
CityMontreal
Period6/19/006/23/00

ASJC Scopus subject areas

  • Computer Science(all)
  • Theoretical Computer Science

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  • Cite this

    Charles Murray, R., & VanLehn, K. (2000). DT tutor: A decision-theoretic, dynamic approach for optimal selection of tutorial actions. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 1839, pp. 153-162). (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 1839). Springer Verlag.