"In an early investigation !mamolu (1973) has demonstrated an effect offurniture density on space perception in rooms, i.e. on the perception ofthe size of the rooms. This study has now been extended to landscapes. Anumber of attributes has been identified that influence space perception inlandscapes. In the classical psycho-physical theory of perception these at-tributes were not recognized as cues for space perception, or they were called illusios. They are for instance the grain of texture of the soil cover-ing, the height and complexity of walls, the presence of loose elements inspace, and brightness. In a moving observer his prior experience also playa role. Space perception is not identical with the perception of depth ordistance because different cues are used, or the same cues in a different way.It is a separate faculty with its own cues, based on an integration of infor-mation. This is in accordance with Bartlett's observation that "even ourelementary perceptions are inferential constructs". Besides ImamoOiu, anumber of authors have found cues for space perception. In order to per-form a systematic investigation on the cues for space perception in land-scapes, seven hypotheses were formulated. Then slides were taken in ter-rains that perrmitted the testing of the hypotheses. The hypotheses were1. The higher the boundary wall of an open space in a landscape the small-er that space will be perceived. 2. The more varied the boundary wall thesmaller the space is perceived. 3. The coarser the texture of the soil cov-ering the smaller the space is perceived. 4. The presence of loose ele-ments in space, such as trees or cattle, makes the space look smaller. 5.A decrease in light intensity makes a space look smaller. 6. When the ob-server comes from a small space a space is perceived as smaller than whenhe comes from a large space. 7. These effects are additive, they strength-en or weaken each other. The hypoteses were tested by comparing the sizeassessment of spaces on pair of slides, having a high and a low value on eachcue. In each pair all the cues were held constant, except the one to be tested.The results justify a distinction between the perception of depth or distanceon the one hand and space perception on the other hand. Proof: Carr(1935) for instance states: "A heterogeneous or differentiated distance isjudged to be longer than a homogeneous or undifferentiated one. " In the ex-periment by Imamo*lu and in this experiment contrary results were foundfor scale perception. And much more arguments can be found. It is conclud-ed that there is no simple connection between space perception and the areaof the ground surface in a landscape, as measured in square meters. There isa limited number of cues that together determine space perception."