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In this new paper Fisher repeats some of his earlier experiments, using a method whereby the subject is encouraged to produce images in a manner analogous to free associations. After the tachistoscopic exposure the subject is asked to describe and make drawings of any images that come to mind. The pictures presented by the tachistoscope are much simpler than in previous experiments. This time geometrical figures, designs, numbers, and words were chosen. The results of the experiments demonstrated that the memory images of preconscious percepts derived from the tachistoscopic exposures appear in the images during the period of 'free imagery'. On the basis of this observation Fisher suggests that the visual perceptual process may be thought of as follows. First there is the registration of the percept. Second, the new percept is integrated with pre-existing memory schemata of a similar type into a new memory, and, third, there is the emergence of the percept into consciousness. The evidence points to the fact that both phases one and two occur unconsciously.
This experimental work has important implications for the psychology of the dream process. Fisher proposes that an elaboration of Freud's theory to include the empirically proven fact of preconscious registration can overcome the difficulties inherent in the first model of the mental apparatus. While certain percepts associated with the daytime experience reach consciousness, many never pass beyond the second stage mentioned above, and remain unconscious. They become preconscious memory images. Simultaneously the unconscious wish transfers its cathexis on to these memory traces which are now subjected to the primary process. This is the preliminary stage of the dream in which the imagery takes the form observed in the imagery experiments. Fisher assumes that there is a further elaboration of these images during the day and into the night. The dream itself arises when there is a second activation of t