Le développement des quantités chez l’enfant

With B. Inhelder

In collaboration with N. Gruner, M. Ingold-Favroz-Coune, O. Kiazim and T. Strauss.

This work opens the period known as “genetic structuralism”, in which the fundamental categories of thought are studied, in particular, number, time and space. This is the main work on the genesis of conservation that extends the problem of functional invariants and structural discontinuities, discussed in The origins of intelligence in children. Piaget and Inhelder demonstrate that the conservation of physical quantities is the result of the construction of logical structures during development.

La genèse du nombre chez l’enfant

With A. Szeminska

In collaboration with Z. Glikin, J. Jaen, T. Katzaroff-Eynard, R. Mehmed-Semin, Z. Trampidis, E. Vauthier and F. Zakon.

This book is the culmination of a research program on the genesis of number, started with Alina Szemińska in the early 1930s. Through a series of simple and ingenious experimental devices, Piaget and Szemińska show that the notion of number results from the synthesis of classification and serialization and depends on a reversible structure.