Physical causality psychological causality. In the present article, we study the relationships between mental representation of an artefact and its symbolic representation in drawing and in linguistic form. Our aim is to analyse the development of causal reasoning on the basis of these different types of representation. Previous studies of causal reasoning do not usually accord any great importance to the verbal nature of the reply. We propose a theoretical framework which combines, on one hand, the research into the role of causality in the physical world and intentional causality in the construction of knowledge and, on the other hand, the research into the development of linguistic skills in the field of causality. This theoretical frame...