Mechanisms of Space Constancy
The problem of space constancy despite movements of the eye is one of information selection. The perceptual system is concerned with the identification of objects, faces, letters of the alphabet, etc., and must be independent of changes in the retinal image that accompany saccadic eye movements. At the same time, the perceptual system must know with great sensitivity about displacements of objects in the world. A space constancy system, therefore, must null retinal information about eye movements while preserving information about movement in the world. Properties of the image that specify events in the world must be processed, while those that specify properties of retinal motion itself must be eliminated.
KeywordsMold Retina Wallach
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- Bridgeman, B., & Stark, L. Efferent copy and visual direction. Investigative Ophthalmology and Visual Science (Supplement), 1981,20, 55.Google Scholar
- Delgado, D., & Bridgeman, B. Foreground/background constancy during visual fixation. Investigative Ophthalmology and Visual Science Supplement, 1982,22, 86.Google Scholar
- Descartes, R. [Treatise of man] (T. H. Hall, trans.). Cambridge, Mass.: Harvard University Press, 1972. (Originally published, 1664.)Google Scholar
- Gibson, J. J. The perception of the visual world. Boston: Houghton Mifflin, 1950.Google Scholar
- Gibson, J. J. The senses considered as perceptual systems. Boston: Houghton Mifflin, 1966.Google Scholar
- Helmholtz, H. von. [A treatise on physiological optics] (J. P. C. Southall, Ed. and trans.). New York: Dover, 1962. (Originally published, 1866.)Google Scholar
- Hering, E. [The theory of binocular vision] (B. Bridgeman, trans., and B. Bridge-man & L. Stark, Eds.). New York: Plenum Press, 1977. (Originally published, 1868.)Google Scholar
- Johnson, C. A., & Scobey, R. P. Foveal and peripheral displacement thresholds as a function of stimulus luminance, line length and duration of movement. Vision Research, 1980, 709–715.Google Scholar
- Kohler, I. [The formation and transformation of the perceptual world] (H. Fiss, trans.). New York: International Universities Press, 1964. (Originally published, 1951.)Google Scholar
- Maay, D. Visual stability. Investigative Ophthalmology, 1972,11, 518–524.Google Scholar
- Maay, D. M. Visual stability and voluntary eye movements. In R. Jung (Ed.), Handbook of sensory physiology (Vol. VII, Part 3): Central visual information A. Berlin: Springer-Verlag, 1973.Google Scholar
- Wallach, H. Eye movement and motion perception. In A. Wertheim, W. Wagenaar, & H. Leibowitz (Eds.), Tutorials on motion perception. New York: Plenum Press, 1982.Google Scholar