criticism is that Wundt largely ignored the areas of psychology that he found less interesting, such as differential psychology, child psychology and educational psychology. In his cultural psychology there is no empirical social psychology because there were still no methods for investigating it at the time. Among his postgraduate students, assistants and other colleagues, however, were several important pioneers: differential psychology, "mental measurement" and intelligence testing (James McKeen Cattell, Charles Spearman), social psychology of group pocesses and the psychology of work (Walther Moede), applied psychology (Ernst Meumann, Hugo Münsterberg), psychopathology, psychopharmacology and clinical diagnosis (Emil Kraepelin). Wundt further influenced many American psychologists to create psychology graduate programs. Wundt's excellence Wundt developed the first comprehensive and uniform theory of the science of psychology. The special epistemological and methodological status of psychology is postulated in this wide-ranging conceptualization, characterized by his neurophysiological, psychological and philosophical work. The human as a thinking and motivated subject is not to be captured in the terms of the natural sciences. Psychology requires special categories and autonomous epistemological principles. It is, on the one hand, an empirical humanity but should not, on the other hand, ignore its physiological basis and philosophical assumptions. Thus a varied, multi-method approach is necessary: self-observation, experimentation, generic comparison and interpretation. Wundt demanded the ability and readiness to distinguish between perspectives and reference systems, and to understand the necessary supplementation of these reference systems in changes of perspective. He defined the field of psychology very widely and as interdisciplinary, and also explained just how indispensable is the epistemological-philosophical criticism of psychological theories and their philosophical prerequisites. Psychology should remain connected with philosophy in order to promote this critique of knowledge of the metaphysical presuppositions so widespread among psychologists. The conceptual relationships within the complete works created over decades and continuously reworked have hardly been systematically investigated. The most important theoretical basis is the empirical-psychological theory of apperception, based on Leibniz's philosophical position, that Wundt, on the one hand, based on experimental psychology and his neuropsychological modelling and, on the other hand, extrapolated into a development theory for culture. The fundamental reconstruction of Wundt's main ideas is a task that cannot be achieved by any one person today due to the complexity of the complete works. He tried to connect the fundamental controversies of the research directions epistemologically and methodologically by means of a co-ordinated concept – in a confident handling of the categorically