Non-scorable Response Detection for Automated Speaking Proficiency Assessment Su-Youn Yoon author Keelan Evanini author Klaus Zechner author 2011-06 text Proceedings of the Sixth Workshop on Innovative Use of NLP for Building Educational Applications Joel Tetreault editor Jill Burstein editor Claudia Leacock editor Association for Computational Linguistics Portland, Oregon conference publication yoon-etal-2011-non https://aclanthology.org/W11-1419/ 2011-06 152 160