Advantages

The test moderator is more free to move about, take notes use data l„. gmg so ware while .he .est is goin, on, and yet is still mn ^T proximity of the participant. Being somewhat removed from L pa" ic
.pant, you need not be as concerned about controlling bodyt— manner,sms and so forth In addition, you may use a%ompu e" wXui distracting the participant.
The participant does not have a complete sense of isolation, because the participant is still in the room with the test moderator. This setup is also more likely to encourage the participant to think aloud, than if left alone in the test room.