The place in which a participant sits can be significant. First of all, a participant may sit next to his friends and those whom he is comfortable sitting next to. Secondly, some participants like to sit close to the trainer at the front while others prefer sitting away from the trainer and at the back. Furthermore, some prefer to site on one side of the training room while others prefer sitting at the other side of the room.
Such preferences are far from being random. In fact, they could be highly significant. Asking trainees to change their places can alter the state of the system and can thus be used by the trainer at times to improve the training process such as when dealing with difficult trainees.