An axiomatization of the theory is presented based on an explication of the 1957 text. Twenty-five theorems are deduced from the seven postulates. An abstract test space for the theory is formulated and the operations for its practical testing discussed. Traditional experimentation with the theory seems generally concerned with few of its propositions and incapable of testing it.

One style of conducting scientific research involves the application of theoretical propositions to an empirical domain under investigation. The investigator plans his research in terms of the theoretical propositions and states his findings in these terms as well. We wish to examine not the merits of this style of research but a difficulty inherent in it. The difficulty concerns what is to be done when disconfirmative results are produced by some discrete study or experiment in the course of such research.

Psychology ought to describe how and explain why we human beings live our lives as we do, which necessarily comes down to how and why we engage in the actions and have the subjective experiencings that we do. Our physical actions are themselves in part subjective phenomena, because actions are not simply body movements but also essentially involve intentions, beliefs about specific causation, and a sense of voluntariness. Thus, whatever else it is, psychology is inescapably the science of explaining the (...) personally subjective. It is time for psychology to openly embrace its subjective subject-matter as such, which would open up a vast domain still waiting to be systematically studied. 2012 APA, all rights reserved). (shrink)