[Development, attachment and relationship: new psychoanalytical concepts].

Authors present the evolution of psychoanalytical views of how a child perceives and contruct the world. They begin with Freud's thought and go through works of Klein, Spitz, Mahler, Bowlby, ending with modern thought of Stern. Developments in understanding of the infant by observations taken through the last thirty years are outlined and implications for psychoanalytical theory and treatment of mental problems are described.