It is the 'zoomorphic' or 'rattomorphic' fallacy - the expressed or implicit contention that there is no essential difference between rat and man - which makes American psychology so profoundly disturbing.
Ludwig von BertalanffyThus even supposedly unadulterated facts of observation already are interfused with all sorts of conceptual pictures, model concepts, theories or whatever expression you choose. The choice is not whether to remain in the field of data or to theorize; the choice is only between models that are more or less abstract, generalized, near or more remote from direct observation, more or less suitable to represent observed phenomena.
Ludwig von BertalanffyI think that the fact that a theory so vague, so insufficiently verifiable, and so far from the criteria otherwise applied in "hard" science, could become a dogma, can be explained only on sociological grounds.
Ludwig von BertalanffyConsidering the inconceivable complexity of processes even in a simple cell, it is little short of a miracle that the simplest possible model - namely, a linear equation between two variables - actually applies in quite a general number of cases.
Ludwig von Bertalanffy