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         author = {Jayagopi, Dinesh Babu and Gatica-Perez, Daniel},
       projects = {Idiap, IM2, AMIDA},
          month = {11},
          title = {Discovering Group Nonverbal Conversational Patterns with Topics},
      booktitle = {Proceedings ICMI-MLMI},
           year = {2009},
       abstract = {This paper addresses the problem of discovering conversa-
tional group dynamics from nonverbal cues extracted from
thin-slices of interaction. We first propose and analyze a
novel thin-slice interaction descriptor - a bag of group non-
verbal patterns - which robustly captures the turn-taking
behavior of the members of a group while integrating its
leader{\^{a}}€™s position. We then rely on probabilistic topic mod-
eling of the interaction descriptors which, in a fully unsu-
pervised way, is able to discover group interaction patterns
that resemble prototypical leadership styles proposed in so-
cial psychology. Our method, validated on the Augmented
Multi-Party Interaction (AMI) meeting corpus, facilitates
the retrieval of group conversational segments where seman-
tically meaningful group behaviours emerge, without the
need of any previous labeling.},
            pdf = {https://publications.idiap.ch/attachments/papers/2009/Jayagopi_ICMI-MLMI_2009.pdf}