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2007

Assessing Entailer with a Corpus of Natural Language from an Intelligent Tutoring System

9 years 11 months ago
Assessing Entailer with a Corpus of Natural Language from an Intelligent Tutoring System
In this study, we compared Entailer, a computational tool that evaluates the degree to which one text is entailed by another, to a variety of other text relatedness metrics (LSA, lemma overlap, and MED). Our corpus was a subset of 100 self-explanations of sentences from a recent experiment on interactions between students and iSTART, an Intelligent Tutoring System that helps students to apply metacognitive strategies to enhance deep comprehension. The sentence pairs were hand coded by experts in discourse processing across four categories of text relatedness: entailment, implicature, elaboration, and paraphrase. A series of regression analyses revealed that Entailer was the best measure for approximating these hand coded values. The Entailer could explain approximately 50% of the variance for entailment, 38% of the variance for elaboration, and 23% of the variance for paraphrase. LSA contributed marginally to the entailment model. Neither lemma-overlap nor MED contributed to any of th...
Philip M. McCarthy, Vasile Rus, Scott A. Crossley,
Added 02 Oct 2010
Updated 02 Oct 2010
Type Conference
Year 2007
Where FLAIRS
Authors Philip M. McCarthy, Vasile Rus, Scott A. Crossley, Sarah C. Bigham, Arthur C. Graesser, Danielle S. McNamara
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