CONF Jayagopi_IEEEINTERNATIONALCONFERENCEONMULTIMEDIA&EXPO(ICME2009)_2009/IDIAP Characterising Conversationsal Group Dynamics Using Nonverbal Behaviour Jayagopi, Dinesh Babu Bogdan, Raducanu Gatica-Perez, Daniel EXTERNAL http://publications.idiap.ch/attachments/papers/2009/Jayagopi_IEEEINTERNATIONALCONFERENCEONMULTIMEDIA&EXPO(ICME2009)_2009.pdf PUBLIC Proceedings ICME 2009 2009 June 2009 This paper addresses the novel problemof characterizing conversational group dynamics. It is well documented in social psychology that depending on the objectives a group, the dynamics are different. For example, a competitive meeting has a different objective from that of a collaborative meeting. We propose a method to characterize group dynamics based on the joint description of a group members’ aggregated acoustical nonverbal behaviour to classify two meeting datasets (one being cooperative-type and the other being competitive-type). We use 4.5 hours of real behavioural multi-party data and show that our methodology can achieve a classification rate of upto 100%.