Quoting Marie Jahoda

Otto Neurath let me participate in a seminar devoted to the translation of Freud's Massenpsychologie und Ich-Analyse into positivist language. I need hardly say that the attempt failed. The conclusion I drew from it was that the tasks of social psychology should be tackled empirically, not philosophically. -Marie Jahoda ('The Emergence of Social Psychology in Vienna', British Journal of Social Psychology 22 (1983): 345)