Incorporating user models into ex-pert systems for educational diagnosis

In this chapter we study a particular real-world domain, that of educational diagnosis. We argue that expert systems for educational diagnosis require user models, and that these user models should include several components, including the user’s background knowledge of both the student and the domain as well as the user’s goals. Our proposal is directed at enhancing the particular expert system of the CGD project. We then propose an architecture for this expert system that separates the knowledge base into relevant components and includes a user model. We further demonstrate that this divided model for the system facilitates providing the best response for a particular user, according to his background knowledge of the domain and of the student and his goals. Finally we argue that the techniques outlined here will be useful in general in expert systems, to vary the response to the user at hand.

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