Who is in the backroom, and what do they do in there?
Usually, the backroom is populated by people from the client company. They are working very hard behind that mirror, listening and taking notes. Sometimes they are back there for up to 10 hours a day, so they may also be eating, talking about the project, or just standing up to stretch. Sometimes, a person working with the moderator is in the backroom leading people in activities designed to apply the information respondents are supplying. Now and then, a person from the backroom may slip a note to the moderator with a question they would like asked. Some brave backroom souls even venture into the interview room and ask some questions themselves.