Abstract
In our society, there are many opportunities to exchange opinions on decision. Problems, such as derails from the subject, waste time by loops, conflicts of opinions, and blocks for frank opinions caused by their relationships, may occur when we exchange opinions. It is desirable for solving these problems to make an environment that can achieve a smooth opinion exchange. There are ``divergence phase" and ``convergence phase" in the opinion exchange for decision. The divergence phase is to enumerate various choices related to the subject, and to consider possibility. On the other hand, in the convergence phase, participants investigate choices arose in the divergence phase, and argue for making a single conclusion. In this paper, we focus on the convergence phase, and propose a system that supports the process narrowing the listed choices by using RFID tags. That is, the system supports smooth progress of opinion exchanges by controlling the time, the speech order, and choice evaluations for leading a single conclusion that many participants can agree.
