Comparaisons de dessins d’objets en perspective cavalière avec un dessin modèle ou avec un objet reél

This project tries to deal with all the difficulties adults of a low educational level are liable to cope with when they reed perspective drawings of an object, the real object being there or not. The subjects have to compare perspective drawings with a “model drawing” or a “model object”. The results show the difficulties of both exercices are related to people’s space conceptualisation: reading spatial depth relationships in drawings, coordination view-points, mental rotation. These observations gives us the possibility to give some didactic suggestions.