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A source book of Gestalt psychology.Further studies of gamma movement.

A source book of Gestalt psychology.: Further studies of gamma movement. Although the phenomena of visual fusion have been extensively studied before, the present inquiry will approach the subject from a new point of view. As a result of Koffka's studies of movement and in view of his conclusions regarding the close relation between movement- and fusion-phenomena, fusion itself now appears in a new light. The task now is to determine the laws holding for both movement and fusion. Our present study will deal with a limiting case following upon the results obtained by Koffka in experiments with moving stimulus objects seen by intermittent illumination. We shall expose a stimulus object twice with a pause between the two exposures. A second point of departure for the present study is the investigation of γ-movement by Lindemann. But whereas Lindemann used only a single exposure, we shall have two, separated by an interval of approximately the same order of magnitude as the exposures themselves. Our experiments can also be considered as a limiting case for Wertheimer's movement phenomena, for whereas his two stimulus objects were separated both in space and in time, ours are identical in space and separate only in time. Finally this study seeks to determine the influence of exposition time, light intensity, size of figure, and also that of fixation, fatigue, etc., upon the point (i.e. threshold) at which the fusion of two objects occurs. (The complete version of this article appeared as "Neue Verschmelzungsprobleme," Psychol. Forsch., 1923, 3, 319-396. (PsycInfo Database Record (c) 2023 APA, all rights reserved) http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

A source book of Gestalt psychology.Further studies of gamma movement.

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Publisher
Kegan Paul, Trench, Trubner & Company
Copyright
Copyright © 1938 American Psychological Association
Pages
182 –191
DOI
10.1037/11496-014
Publisher site
See Chapter on Publisher Site

Abstract

Although the phenomena of visual fusion have been extensively studied before, the present inquiry will approach the subject from a new point of view. As a result of Koffka's studies of movement and in view of his conclusions regarding the close relation between movement- and fusion-phenomena, fusion itself now appears in a new light. The task now is to determine the laws holding for both movement and fusion. Our present study will deal with a limiting case following upon the results obtained by Koffka in experiments with moving stimulus objects seen by intermittent illumination. We shall expose a stimulus object twice with a pause between the two exposures. A second point of departure for the present study is the investigation of γ-movement by Lindemann. But whereas Lindemann used only a single exposure, we shall have two, separated by an interval of approximately the same order of magnitude as the exposures themselves. Our experiments can also be considered as a limiting case for Wertheimer's movement phenomena, for whereas his two stimulus objects were separated both in space and in time, ours are identical in space and separate only in time. Finally this study seeks to determine the influence of exposition time, light intensity, size of figure, and also that of fixation, fatigue, etc., upon the point (i.e. threshold) at which the fusion of two objects occurs. (The complete version of this article appeared as "Neue Verschmelzungsprobleme," Psychol. Forsch., 1923, 3, 319-396. (PsycInfo Database Record (c) 2023 APA, all rights reserved)

Published: Aug 13, 2007

Keywords: gamma movement; visual fusion; Gestalt psychology; illumination

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