@InProceedings{mizumoto-nagata:2017:NLPTEA,
  author    = {Mizumoto, Tomoya  and  Nagata, Ryo},
  title     = {Analyzing the Impact of Spelling Errors on POS-Tagging and Chunking in Learner English},
  booktitle = {Proceedings of the 4th Workshop on Natural Language Processing Techniques for Educational Applications (NLPTEA 2017)},
  month     = {December},
  year      = {2017},
  address   = {Taipei, Taiwan},
  publisher = {Asian Federation of Natural Language Processing},
  pages     = {54--58},
  abstract  = {Part-of-speech (POS) tagging and chunking have been used in tasks targeting
	learner English;
	however, to the best our knowledge, few studies have evaluated their
	performance and no studies have revealed the causes of POS-tagging/chunking
	errors in detail.
	Therefore, we investigate performance and analyze the causes of failure. We
	focus on spelling errors that occur frequently in learner English.
	We demonstrate that spelling errors reduced POS-tagging performance by 0.23\%
	owing to spelling errors, and that a spell checker is not necessary for
	POS-tagging/chunking of learner English.},
  url       = {http://www.aclweb.org/anthology/W17-5909}
}