{"type":"ScholarlyArticle","title":"Unsupervised Modeling of Dialog Acts in Asynchronous Conversations","authors":[{"name":"Shafiq R. Joty","slug":"shafiq-r-joty","given":"Shafiq R.","family":"Joty","affiliation":""},{"name":"Giuseppe Carenini","slug":"giuseppe-carenini","given":"Giuseppe","family":"Carenini","affiliation":""},{"name":"Chin-Yew Lin","slug":"chin-yew-lin","given":"Chin-Yew","family":"Lin","affiliation":""}],"abstract":"We present unsupervised approaches to the problem of modeling dialog acts in asynchronous conversations; i.e., conversations where participants collaborate with each other at different times. In particular, we investigate a graph-theoretic deterministic framework and two probabilistic conversation models (i.e., HMM and HMM+Mix) for modeling dialog acts in emails and forums. We train and test our conversation models on (a) temporal order and (b) graph-structural order of the datasets. Empirical evaluation suggests (i) the graph-theoretic framework that relies on lexical and structural similarity metrics is not the right model for this task, (ii) conversation models perform better on the graph-structural order than the temporal order of the datasets and (iii) HMM+Mix is a better conversation model than the simple HMM model.","doi":"10.5591/978-1-57735-516-8/IJCAI11-303","url":"https://ijcai.org/proceedings/2011/303","pdf":"https://ijcai.org/proceedings/2011/0303.pdf","markdown":"https://ijcai.org/proceedings/2011/303.md","bibtex":"https://ijcai.org/proceedings/2011/bibtex/303","volume":{"slug":"2011","title":"Proceedings of the Twenty-Second International Joint Conference on Artificial Intelligence","short_title":"IJCAI 2011","url":"https://ijcai.org/proceedings/2011/","year":2011,"location":"Barcelona, Catalonia, Spain","dates":"16–22 July 2011","editors":"Toby Walsh","isbn":"978-1-57735-512-0; 978-1-57735-513-7; 978-1-57735-514-4; 978-1-57735-515-1; 978-1-57735-516-8","publisher":"AAAI Press/International Joint Conferences on Artificial Intelligence","doi_prefix":""},"section":null,"track":"","number":303,"pages":{"first":1807,"last":1812},"keywords":[],"videos":[],"references":[],"license_note":"Copyright International Joint Conferences on Artificial Intelligence."}