The emphasis on "ego function" in psychoanalysis and experimental psychology has found major focus in the areas of perception, memory, and cognition. Methods of incidental stimulation, stemming from Poetzl's original work, have been devised so as to provide data for investigation of imagery formation, preconscious processes, the psychology of dreaming, and ego defense mechanisms.Fisher3 in a recent monograph which includes translations of the classic papers by Poetzl, and Allers and Teller, has presented a well-considered review of the current literature. Flavell and Draguns4 in 1957 published a broad based historical perspective of the "microgenetic* approach to perception and thought."Adams1 and McConnell, Cutler, and McNeil,8 have provided reviews of the literature on "behavior without awareness" and "subliminal stimulation." Eriksen2 and Goldiamond6 have critically evaluated experimental methods and data analysis. The work of Fisher,3
CORMAN HH, ESCALONA SK, REISER MF. Visual Imagery and Preconscious Thought Processes. Arch Gen Psychiatry. 1964;10(2):160–172. doi:10.1001/archpsyc.1964.01720200056009
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