Evaluating State Representations for Reinforcement Learning of Turn-Taking Policies in Tutorial Dialogue Christopher Mitchell author Kristy Boyer author James Lester author 2013-08 text Proceedings of the SIGDIAL 2013 Conference Maxine Eskenazi editor Michael Strube editor Barbara Di Eugenio editor Jason D Williams editor Association for Computational Linguistics Metz, France conference publication mitchell-etal-2013-evaluating https://aclanthology.org/W13-4052/ 2013-08 339 343