Psychology is again revitalizing efforts to explore the nature and extent of human consciousness. Although consciousness has always been the central subject matter of psychology, various metholodological and ideological "schools" have often quarreled as to exactly what constitutes the appropriate measure of the subject. What is most significant about the resurrection of consciousness as a focal point for psychological inquiry--although for some it was never really dead--is that advances and innovations in scientific methodology and in the philosophy of science as well have brought what once were considered metaphysical, non-empirical and even theological issues within the realm of rigorous scientific investigation. Methodological approaches to consciousness have included both the empirical-experimental, involving psychobiology, psychopharmacology and biofeedback research and the empirical-experiential, resulting in increasing cohesion in these two seemingly conflictual modes of study. Possibly the most significant issue for the inclusion of consciousness as an acceptable subject matter for scientific psychology is a better understanding of the very nature and process of science itself. Those who claim status as scientists must examine, or re-examine, the philosophy of their own discipline to discover, or rediscover, the workings of scientific methodology and attitudes concerning knowledge itself. (Author/SJL)