The work of Watson about thinking was treated inadequately by many interpreters, generating a gap in the history of Psychology, since Watson exerted ample influence on Psychology. Our objective is to elucidate part of this problem by clarifying the main Watson´s positions about the thought. Our hypothesis is that the Watson's theory about thinking as a habit is a form of materializing reference, influenced by the demetaphysization of the Western thought originating from the Iluminism. We admit that his theory reproduced premises of the Cartesian error of category. We also assume that the prioritary association between thinking and language in Watson denounces indirect influences of the classic greek philosophical tradition.
Watson; thinking; behaviorism; history of Psychology