  Recently, research in human-robot interaction began to consider a robot's
influence at the group level. Despite the recent growth in research
investigating the effects of robots within groups of people, our overall
understanding of what happens when robots are placed within groups or teams of
people is still limited. This paper investigates several key problems for
social robots that manage conversations in a group setting, where the number of
participants is more than two. In a group setting, the conversation dynamics
are a lot more complicated than the conventional one-to-one conversation, thus,
there are more challenges need to be solved.
