A landscape is not perceived the same way by a historian or a geographer, a countryman or a townsman. Certain dispositions or competences are particularly capable of influencing perceptive discrimination. One can think, for instance, that painters or people with some artistic education have a particular vision of reality. The present investigation tries to verify this hypothesis by comparing the results obtained in the course of a perspective differentiation task done by individuals who belong to the three different groups: a group of fine arts students; a second group of Psychology students an a control group of other disciplines. The method used is the method of the Repertory Grid, based on Kelly's theory of constructs. The stimuli, which are colour slides of natural landscapes, are presented by triads, and the individual has to express the criteria that connects two photos relating them to a third: by this means we obtain a grid, in which we have, respectively, in lines and columns the photos to be distinguished and the constructs that are associated to the photos. If we compare the groups of individuals, we can study the richness and the diversity of the constructs system used by each group and compare the results of factorial analysis based on these results. These show an important difference between the three groups. Whereas psychologists favor the perceptive elements which manifest man's presence, artists see in landscape line and colour as an ensemble. As for control group,they perceives mainly the natural elements.