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Researchers have used various methods to evaluate the fine-grained interactions of intelligent tutors with their students. We present a case study comparing three such methods on the same data set, logged by Project LISTEN’s Reading Tutor from usage by 174 children in grades 2-4 (typically 7-10 years) over the course of the 2005-2006 school year. The Reading Tutor chooses randomly between two different...
Most ITS have a means of providing assistance to the student, either on student request or when the tutor determines it would be effective. Presumably, such assistance is included by the ITS designers since they feel it benefits the students. However, whether—and how—help helps students has not been a well studied problem in the ITS community. In this paper we present three approaches for evaluating...
A basic question of instruction is how much students will actually learn from it. This paper presents an approach called learning decomposition, whichdetermines the relative efficacy of different types of learning opportunities. This approach is a generalization of learning curve analysis, and uses non-linear regression to determine how to weight different types of practice opportunities relative...
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