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Candidate sentence selection for language learning exercises : from a comprehensive framework to an empirical evaluation

Ildikó Pilán, Elena Volodina, Lars Borin

Språkbanken, University of Gothenburg, Box 100, 40530 Gothenburg, Sweden

We present a framework and its implementation relying on Natural Language Processing methods, which aims at the identification of exercise item candidates from corpora. The hybrid system combining heuristics and machine learning methods includes a number of relevant selection criteria. We focus on two fundamental aspects : linguistic complexity and the dependence of the extracted sentences on their original context. Previous work on exercise generation addressed these two criteria only to a limited extent, and a refined overall candidate sentence selection framework appears also to be lacking. In addition to a detailed description of the system, we present the results of an empirical evaluation conducted with language teachers and learners which indicate the usefulness of the system for educational purposes. We have integrated our system into a freely available online learning platform.

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Ildikó Pilán, Elena Volodina, Lars Borin
420.3 ko

TAL Volume 57 2016 . 3. TALP et didactique

Date de dernière mise à jour : 27 septembre 2017, auteur : root.