ITS '02 Proceedings of the 6th International Conference on Intelligent Tutoring Systems
Experiences in Implementing Constraint-Based Modeling in SQL-Tutor
ITS '98 Proceedings of the 4th International Conference on Intelligent Tutoring Systems
ITCC '04 Proceedings of the International Conference on Information Technology: Coding and Computing (ITCC'04) Volume 2 - Volume 2
Designing an Ontology-Based Intelligent Tutoring Agent with Instant Messaging
ICALT '05 Proceedings of the Fifth IEEE International Conference on Advanced Learning Technologies
An introduction to ROC analysis
Pattern Recognition Letters - Special issue: ROC analysis in pattern recognition
Modeling individual and collaborative problem-solving in medical problem-based learning
User Modeling and User-Adapted Interaction
COMET: A Collaborative Tutoring System for Medical Problem-Based Learning
IEEE Intelligent Systems
A Knowledge Acquisition System for Constraint-based Intelligent Tutoring Systems
Proceedings of the 2005 conference on Artificial Intelligence in Education: Supporting Learning through Intelligent and Socially Informed Technology
Enriching Solution Space for Robustness in an Intelligent Tutoring System
Proceedings of the 2007 conference on Supporting Learning Flow through Integrative Technologies
An intelligent tutoring system for visual classification problem solving
Artificial Intelligence in Medicine
ICWL'07 Proceedings of the 6th international conference on Advances in web based learning
Concepts, Structures, and Goals: Redefining Ill-Definedness
International Journal of Artificial Intelligence in Education
International Journal of Artificial Intelligence in Education
METEOR: medical tutor employing ontology for robustness
Proceedings of the 16th international conference on Intelligent user interfaces
Leveraging a domain ontology to increase the quality of feedback in an intelligent tutoring system
ITS'10 Proceedings of the 10th international conference on Intelligent Tutoring Systems - Volume Part I
Employing UMLS for generating hints in a tutoring system for medical problem-based learning
Journal of Biomedical Informatics
When less is more: focused pruning of knowledge bases to improve recognition of student conversation
ITS'12 Proceedings of the 11th international conference on Intelligent Tutoring Systems
Clinical reasoning gains in medical PBL: an UMLS based tutoring system
Journal of Intelligent Information Systems
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In well-defined domains such as Physics, Mathematics, and Chemistry, solutions to a posed problem can objectively be classified as correct or incorrect. In ill-defined domains such as medicine, the classification of solutions to a patient problem as correct or incorrect is much more complex. Typical tutoring systems accept only a small set of approved solutions for each problem scenario fed to the system. Plausible student solutions that fall outside the scope of this small set of approved solutions are rejected as being incorrect, even though these solutions may be acceptable or close to acceptable. This leads to brittleness in the evaluation of student solutions. This paper describes a tutoring system for medical problem-based learning (PBL), which can accept a wide variety of plausible solutions without placing an extensive burden on knowledge acquisition. A widely available medical knowledge source is deployed as a domain ontology, and concept relationships in the ontology are used to make inferences and expand the space of plausible solutions beyond the scope of solutions explicitly provided to the system. Parent-child relationships are used to infer generalized solutions, whereas relationships of synonymy are used to infer alternate solutions. Evaluations of the system after expanding the solution space indicate accuracy close to that of human experts, who agreed among themselves with Pearson Correlation Coefficient of 0.48 and p