Although distributed Group Support Systems (GSS) are getting popular, there are still some limitations. One of the limitations is few substitutions for face-to-face (FTF) interaction (whether it is related to meeting content or not), so we may say that FTF interaction is one of the advantages of proximate types of GSS. However, there are few studies that focus only on the role of FTF interaction in proximate GSS sessions, so it is unclear what the real advantages may be. If we understand the role of FTF interaction better, we can understand how proximate GSS is important perhaps understand better the role of face to face interaction when compared to distributed GSS. When data regarding face to face interaction was studies, many experimental studies separated FTF interaction from computer based interaction in GSS sessions. But, if people are gathered at same place under actual meeting conditions, it is assumed that they automatically talk about something. Therefore FTF interaction, esp...