One-way mirror room or 360 room: what changes for the decision-maker
Both let the brand follow the focus group live. In a one-way mirror room you watch from behind the glass, with the team together. In WAV's 360 room the brand also follows the session live, and a 360 recording with one microphone per person stays behind, so you can return to any minute later and know for certain who said each sentence. One is for observing; the other is for observing and checking.
What is a one-way mirror room?
It is the classic focus group facility: a room split by a one-way mirror. On one side sit the group and the moderator; on the other, the brand team watches and listens without being seen. In Latin America it is usually called a Gesell chamber, after the psychologist Arnold Gesell, who used that kind of mirror to observe children without interfering.
It has a strength worth taking seriously: the brand lives the session. Hearing a customer explain, live, why they would not buy again changes more minds inside a company than any report.
What is a 360 room?
It is how we work at WAV. The group sits around one long surface, a 360 camera records the whole room and every participant wears their own microphone. Everything is synchronized, so each sentence has its voice, its face and its exact minute. The room is in Santiago, Chile, where we run groups of 6 to 8 people in sessions of 90 to 120 minutes.
The real difference is not the mirror but the recording: a 360 room leaves a session that can be reviewed and quoted precisely, and a report where every finding points to the moment it was said.
What does the brand gain with each one?
| Criterion | One-way mirror room | 360 room, one microphone per person |
|---|---|---|
| Watching live | Yes, behind the mirror, with the team together | Yes, the brand follows the session live, and the recording stays to review every minute |
| What you see | What the mirror's angle allows | The whole group, in 360 |
| Knowing who said what | Relies on notes and room audio | Each voice on its own microphone, synchronized with the image |
| Going back to a moment | If it was recorded, searching by hand | Every quote in the report carries its exact minute |
| People who could not attend | Rely on a summary | See the same evidence as those who were there |
| What is left for analysis | Notes, plus whatever was recorded | Video of the whole room and each person's audio on its own track |
Why does it matter who said each sentence?
Because a qualitative study compares segments. If a sentence said by a non-customer is attributed to a customer, the finding switches sides without anyone noticing. Room audio is not enough to prevent it: in a real focus group we measured that a microphone's wearer was the loudest voice on their own microphone only 11 of 120 seconds; the rest of the time it picked up their neighbours. In a report built by hand from a single room microphone, only 1 in 10 quoted people was attributed.
With one microphone per person, WR3, our software, separates who is speaking with 90.4% agreement with human review, measured on 141 moments of a real session. What it cannot decide it flags for a person to settle by listening. The detail behind each figure is in how we measure.
And the experience of watching live?
It has value and we do not want to play it down, which is why in the 360 room the brand can also follow the session live. What the 360 room adds is that the evidence does not depend on who was watching: the team receives the 360 video of each session, with burned-in English subtitles, and every finding with its quote and its minute. Whoever decides can hear the person who said it without relying on the memory of whoever was in the room.
If watching from behind a mirror, next to the room, is essential for your team, a one-way mirror room is the natural choice, and the session should still be recorded with good audio per person for the analysis.
How do you choose?
- Choose a one-way mirror room if what matters most is that the team watches from behind the glass, next to the room, and discusses it as it happens.
- Choose a 360 room if you want to follow the session live and also need a report that survives the question "who said that, and where can I hear it?", or if the people deciding will not be in the room.
You can see how quotes are presented with their minute in the sample report, built from a fictional study.