ABSTRACT
The difference between the sensory systems is that their contributions to the inter-sensory perception of space and spatial structure may be different, for instance with respect to accuracy or level of detail. The auditory proximal space can be described by means of two physical dimensions: amplitude and time. Orientation and direction are structural properties concerned with spatial relations between places or sets of places in space, such as objects, forms and so forth. The orientation attributable to a pattern or form consists of the relationship between the overall space and the 'proper space' of the pattern or form. In natural space, the optimal loading will depend mainly on the direction of gravity whereas the orientation ascribed to a picture of a non-natural scene, geometrical forms for instance, will presumably correspond with the frame or the edges of the paper. The acquisition of the ability to construct a Cartesian representation of space will take a long time.
