Abstract

The extent to which shape and size constancy are preserved in photographic reproductions was investigated by comparison of the constancy effect in both test objects and photographs of the test objects. For shape, the photograph reduces the amount of constancy by less than 50%. However, for size, there is very little constancy obtained with the photograph. For test objects, binocular observation gives higher constancy for both size and shape than does monocular viewing. For photographs, there is little or no difference between monocular and binocular observation. The implications of the data are discussed in relation to the theory of the corresponding perceptual processes.

© 1957 Optical Society of America

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