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An explicit representation of knowledge is central for an Intelligent Tutoring System (ITS). In order for a system to acquire the necessary flexibility, its knowledge representation framework should distinguish between several types of knowledge and structure them in layers. Here, we present a method for representing domain knowledge for an ITS, using hierarchical knowledge structures and a multilevel...
Our spelling correction program is part of a system for understanding illformed input in an intelligent tutoring system for medical students. Speed and user-friendliness were the most important considerations in the design. The system can correct most kinds of spelling errors including order reversal, missing characters, added characters, and character substitutions. It also handles novel abbreviations...
The tutoring protocol controls the interaction between the tutor and the student in a tutoring session. Our goals are to understand human tutoring so that we can emulate it better and to discover which tutoring protocol gives the best results in teaching causal reasoning. We used C5.0 to analyze a set of human tutoring transcripts to discover how and when human tutors switch protocols. In order to...
The aim of this research is to develop an intelligent tutoring system (ITS) which teaches students the causal relationships between the components of the circulatory physiology system and the complex behavior of the negative feedback system that stabilizes blood pressure. This system will accept natural language input from students and generate limited natural language explanations. It contains rules...
The Pathophysiology Tutor (PPT) is intended to assist students to integrate their knowledge of cardiovascular physiology and to learn to apply it to solve pathophysiology problems using a hypothetico-deductive reasoning process. While PPT is not yet a "smart tutor", it incorporates a number of features of such programs. It is implemented in Turbo-PROLOG using a rule-based formalism...
An authoring program, TRAS (Tutoring Rule Authoring System) has been designed and written to allow teachers and other programming-naive individuals to create and assemble the rules for rule based programs. The program has two component parts: TRE (Tutoring Rule Editor) and TPT (Text to Prolog Translator). TRE enables the user to create rules by specifying the conditional and action clauses that are...