In one of his books, Schultz-Hencke had asserted that all psychotherapy should be submitted to the
Leibnizian principle that "all science must be expressed in mathematical terms." This implies that even a young science must strive towards this goal. In this perspective, Schultz-Hencke analyzed all Freudian concepts and eliminated all those that do not respond to this precept, or that, according to him, could never respond to it, such as
infantile sexuality, etc. So, in a way, the dualistic view of Freudian psychoanalysis is challenged in favor of a monistic view (and thus does not include notions of conflict between psychic entities, etc.). Schultz-Hencke also wanted to subject the
Oedipus complex to
statistical studies. To some extent, this criticism joined that of
Karl Popper and other more modern scientists who, before anything else, advocated quantitative analysis and, thus, statistics. The treatment technique advocated by Schultz-Hencke was subsequently developed by Helmut Bach, among others, who progressively demarcated the ideas of its founder to create a "psychoanalysis" within the limits of practices imposed by the IPA; psychotherapists such as
Franz Alexander,
Karen Horney,
René Laforgue, and
Erich Fromm have contributed significantly to this endeavor. ==Publications (selected)==