With the increasing globalization of economy and consequent increasing in the inter and intra organizational competitiveness, the role of groups in organizations and businesses achieve greater significance. The work, as well as the responsibility involved to reach a decision, is distributed among group members, which may be distributed geographically and may cooperate in an asynchronous way. This paper shortly presents the WebMeeting prototype, which is a group decision support system that supports ubiquitous group decision meetings. It is also discussed the influence of emotional factors in group decision making and it is proposed a multi-agent model to simulate ubiquitous group decision making processes, where argumentation and emotional capabilities are considered.
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