In conducting experiments, especially with beginners, it is best to have a room isolated as much as possible from the rest of the house, so as to avoid interruptions and the distraction of the subject's mind by the noises of the household. For this reason also the room should be remote from the street, the walking of pedestrians and the movements of vehicles being liable to interrupt the perfectly passive state of mind which is requisite to successful hypnosis.

The furniture of the room should be plain and no unusual pictures or bric-a-brac should be displayed to attract attention. Carpet on the floor will prevent any noise from walking or from the movement of chairs. When there is no carpet, rubber buttons should be placed on the legs of chairs. It is very annoying to get a subject almost under control and then accidentally arouse him by the noise of a moving or creaking chair.

White, glaring walls are not good, neither are brilliant or grotesque hangings. Plain unfigured wall paper of a subdued tint will be found most favorable.