ABSTRACT
This chapter explores a European perspective on Robert Siegler's contribution. Robert Siegler's contribution is so impressive and universally acknowledged, his views have been so influential in our understanding of children's thinking and development, that it would certainly be presumptuous to claim that one can provide an exact reflection of the impact such a contribution has had on European developmental psychology. The chapter also explores the view of the uniqueness of Robert Siegler's approach and the way in which it questioned and went beyond European developmental psychology, necessarily strongly influenced by Piaget's work, especially for French-speaking psychologists. Piaget's main idea in studying the equilibration of cognitive structures was that development does not simply result from perception or experience with objects, nor from an innate and preformed programming within the subject, but from the interactions between the subject and the object.
