Abstract: An instrument for the study of certain aspects of individual and interpersonal human behavior is described. The instrument is a portable room in which the behavior of one or more people can be observed and statistically analyzed in such a way as to increase understanding of certain physical and psychological factors influencing human behavior. This portable room has a floor plan, in a preferred embodiment, in the shape of a regular hexagon 7.5 meters (approximately 24.6 feet) across its longest dimension. This hexagonal floor space is enclosed by six curtain walls supported by a framework that can be folded for convenient storage when not in use. The floor of the room is a flexible cloth or plastic sheet with a pattern of equilateral triangles inscribed on its surface. These features of the room or instrument are utilized to facilitate a statistical analysis that produces scientific results not obtainable by other methods.