"Cross cultural research attempts to determine whether the perceptu-al ecology of the environment actually shapes an individual's per-ception and to what extend. If indeed the perceptual environment shapes or contributes towards the formation of an individual's per-ceptual ability, then the immediate man-made environment created by architecture acts directly upon human behavior. These observa-tions must be corelated to the studies concerned a. with the de-gree of complexity of the environment, b. with the importance of the processes rather than the objects for the organization of the visual, and generally, the perceptual environment. The role of the physical environment as a 'field of learning" is then stressed. The practical importance of these observations is made obvious by two examples."