A comparison of greedy and optimal assessment of natural language student input using word-to-word similarity metrics

  • Authors:
  • Vasile Rus;Mihai Lintean

  • Affiliations:
  • The University of Memphis, Memphis, TN;The University of Memphis, Memphis, TN

  • Venue:
  • Proceedings of the Seventh Workshop on Building Educational Applications Using NLP
  • Year:
  • 2012

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Abstract

We present in this paper a novel, optimal semantic similarity approach based on word-to-word similarity metrics to solve the important task of assessing natural language student input in dialogue-based intelligent tutoring systems. The optimal matching is guaranteed using the sailor assignment problem, also known as the job assignment problem, a well-known combinatorial optimization problem. We compare the optimal matching method with a greedy method as well as with a baseline method on data sets from two intelligent tutoring systems, AutoTutor and iSTART.