@InProceedings{ono-EtAl:2017:W17-55,
  author    = {Ono, Kohei  and  Takeda, Ryu  and  Nichols, Eric  and  Nakano, Mikio  and  Komatani, Kazunori},
  title     = {Lexical Acquisition through Implicit Confirmations over Multiple Dialogues},
  booktitle = {Proceedings of the 18th Annual SIGdial Meeting on Discourse and Dialogue},
  month     = {August},
  year      = {2017},
  address   = {Saarbrücken, Germany},
  publisher = {Association for Computational Linguistics},
  pages     = {50--59},
  abstract  = {We address the problem of acquiring the ontological categories of unknown terms
	through implicit confirmation in dialogues. We develop an approach that makes
	implicit confirmation requests with an unknown term's predicted category. Our
	approach does not degrade user experience with repetitive explicit
	confirmations, but the system has difficulty determining if information in the
	confirmation request can be correctly acquired. To overcome this challenge, we
	propose a method for determining whether or not the predicted category is
	correct, which is included in an implicit confirmation request. Our method
	exploits multiple user responses to implicit confirmation requests containing
	the same ontological category. Experimental results revealed that the proposed
	method exhibited a higher precision rate for determining the correctly
	predicted categories than when only single user responses were considered.},
  url       = {http://aclweb.org/anthology/W17-5507}
}