What Should the Tutor Do When the Student Cannot Answer a Question?

Yujian Zhou, Illinois Institute of Technology; Reva Freedman, University of Pittsburgh and Illinois Institute of Technology; Michael Glass, Illinois Institute of Technology; Joel A. Michael and Allen A. Rovick, Rush Medical College; Martha W. Evens, Illinois Institute of Technology

In this paper we describe how to simulate the behavior of a human tutor when the student cannot answer a question in a dialogue-based tutoring system. This paper describes an implementation of our analysis of human tutoring behavior using the simple plan-based framework of our tutoring system CIRCSIM-Tutor v. 2. By carefully choosing the retry strategies according to our categorization of the student’s answer, our machine tutor can simulate some sophisticated human tutoring behaviors, such as hinting and grain of truth responses.

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