Optimising Incremental Dialogue Decisions Using Information Density for Interactive Systems

Nina Saskia Dethlefs, Helen Hastie, Verena Rieser, Oliver Lemon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract / Description of output

Incremental processing allows system designers to address several discourse phenomena that have previously been somewhat neglected in interactive systems, such as backchannels or barge-ins, but that can enhance the responsiveness and naturalness of systems. Unfortunately, prior work has focused largely on deterministic incremental decision making, rendering system behaviour less flexible and adaptive than is desirable. We present a novel approach to incremental decision making that is based on Hierarchical Reinforcement Learning to achieve an interactive optimisation of Information Presentation (IP) strategies, allowing the system to generate and comprehend backchannels and barge-ins, by employing the recent psycholinguistic hypothesis of information density (ID) (Jaeger, 2010). Results in terms of average rewards and a human rating study show that our learnt strategy outperforms several baselines that are not sensitive to ID by more than 23%.
Original languageEnglish
Title of host publicationEMNLP-CoNLL 2012: Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning Jeju, South Korea, July 12-14
PublisherAssociation for Computational Linguistics
Pages82-93
Number of pages12
ISBN (Print)9781937284435
Publication statusPublished - 2012
Event2012 Joint Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning, EMNLP-CoNLL 2012 - Jeju Island, Korea, Republic of
Duration: 12 Jul 201214 Jul 2012
http://emnlp-conll2012.unige.ch/

Conference

Conference2012 Joint Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning, EMNLP-CoNLL 2012
Country/TerritoryKorea, Republic of
CityJeju Island
Period12/07/1214/07/12
Internet address

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