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Intelligent critiquing and tutoring of spatial reasoning skills

Published online by Cambridge University Press:  27 February 2009

Ole Jakob Mengshoel ,
Sanjeev Chauhan  and
Yong Se Kim
Ole Jakob Mengshoel
Affiliation:
Department of Computer Science
Sanjeev Chauhan
Affiliation:
Department of General Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801-2996, U.S.A.
Yong Se Kim
Affiliation:
Department of General Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801-2996, U.S.A.
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Abstract

The ability to reason spatially is an important skill required for engineers, particularly in engineering design and construction. One aspect of spatial reasoning is visualizing and constructing three-dimensional (3D) solid objects from two-dimensional (2D) projections. To assist in teaching this to engineering students, an instructional software system is being developed at the University of Illinois. This instructional software system is comprised of the Visual Sweeper and the Visual Teacher. The Visual Sweeper is a geometric framework for solving missing view problems. In missing view problems, students create 3D solid objects from two 2D projections by applying operations inverse to orthographic projection. The Visual Teacher, which is the focus of this article, is an intelligent critiquing and tutoring module that gives feedback to the student regarding partial solutions to missing view problems. The Visual Teacher is comprised of a Recognizer and a Critiquer. The Recognizer identifies which solution solid the student's partial solution is closest to. Based on the solution solid and a student's partial solution, the Criti-quer gives critique and advice to the student. The Recognizer is based on an algorithm for bipartite graph matching, while the Critiquer uses a rule-based approach. This paper describes the Visual Teacher, gives examples of how it can be used, presents preliminary evaluation results, and discusses the system's assumptions and limitations.

Keywords

Intelligent TutoringSpatial ReasoningMissing View ProblemBipartite Graph MatchingRule-Based Programming
Type
Articles
Information
AI EDAM , Volume 10 , Issue 3 , June 1996 , pp. 235 - 249
Copyright
Copyright © Cambridge University Press 1996

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