Carnap and the constitution of experience

In 1928 Rudolf Carnap wrote der logische Aufbau der Welt, in which he sought to use the tools of relationship logic devised by Frege and Russell to deal with the old Kantian problem related to the constitution of experience. Carnap's concerns coincided tangentially with some developments in Gestalt psychology theorists; with some debates held by early-century New Kantians interested in updating the philosopher