I want to ask: what is knowledge of human beings and can it be acquired by experimental methods? It is a widespread assumption in academic psychology that the methods which have been applied with great success in the physical sciences are applicable to investigations in other areas and hence to psychological investigation. The history of experimental psychology is the history of the adjustments psychologists have made to their subject to be able to apply the experimental method of the sciences to (...) it. In the process of trimming the head to fit the cap on it they have emasculated psychology. (shrink)