Computing Backchannel Distributions in Multi-Party Conversations Dirk Heylen author Rieks op den Akker author 2007-06 text Proceedings of the Workshop on Embodied Language Processing Justine Cassell editor Dirk Heylen editor Association for Computational Linguistics Prague, Czech Republic conference publication heylen-op-den-akker-2007-computing https://aclanthology.org/W07-1903/ 2007-06 17 24