ISCA International Workshop on Speech and Language Technology in Education (SLaTE 2011)

Venice, Italy
August 24-26, 2011

Feedback in an ASR-Based CALL System for L2 Syntax: A Feasibility Study

Stephen Bodnar, Bart Penning de Vries, Catia Cucchiarini, Helmer Strik, Roeland van Hout

Centre for Language and Speech Technology, Radboud University Nijmegen, The Netherlands

In the FASOP project, we are interested in using CALL systems to study issues in foreign language learning, particularly those related to the acquisition of spoken proficiency. Specifically, we use ASR in a CALL system that provides oral practice exercises to investigate the role of corrective feedback in syntax acquisition of Dutch L2. To investigate the feasibility of this proposal we built and tested a CALL system in a pilot experiment. This paper analyses the accuracy of the feedback in the system, showing that it performs accurately. We also provide an overview of learner behaviour in the exercises, with a view to understanding how learners respond to feedback, and to system errors. Based on our analysis, we suggest ways of improving the feedback that might increase training effectiveness without exceeding the limits of the ASR technology.
Index Terms. CALL, ASR, grammar, corrective feedback

Full Paper

Bibliographic reference.  Bodnar, Stephen / Vries, Bart Penning de / Cucchiarini, Catia / Strik, Helmer / Hout, Roeland van (2011): "Feedback in an ASR-based CALL system for L2 syntax: a feasibility study", In SLaTE-2011, 113-116.