ELEMENTS, CONSCIOUS, the simplest, independently observable constituents of conscious experience. In the late 19th and early 20th centuries the conviction was widespread among psychologists that all conscious phenomena could be reduced to combinations of a limited number of simple observable constit uents, termed "conscious elements." There was little agreement, however, as to the nature of these constituents. W. Wundt believed them to be of two main types,—sensations and feelings. E. B. Titchener, one of the most influential of Wundt's pupils, dis tinguished a third main type,—images. Chr. von Ehrenfels and other members of the school of Gestaltqualitat insisted that consciousness involved a further class of elements, namely, form qualities (Gestaltqualitdten). Yet another view was advocated by the school of "imageless thought," whose members claimed to find in consciousness certain impalpable elements which they termed knowledges (Bewusstheiten).


See W. Wundt, Outlines of Psychology (and ed.) ; M. Bentley, American Journal of Psychology (vol. xiii., 19o2) ; E. B. Titchener, Lectures on the Experimental Psychology of the Thought-Processes (1go9) ; C. Rahn, Psychological Monographs (No. 67, 1913) ; K. Koffka, Psychological Bulletin (vol. xix., 1923) ; W. Koehler, Psychol ogies of 1925 (1926). (J. G. B.-C.)