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An instrument demonstrates a rectangular Pulfrich effect by varying target input, suggesting new insights into visual perception.
A versatile multi‐input device based on an x‐y recorder was designed for the study of the Pulfrich effect. Because the device provided constant velocity of the target, a rectangular Pulfrich effect was observed rather than the traditional elliptical effect. The instrument permits study of the response induced when the input is changed in a variety of ways.
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Kenneth J. Ciuffreda (1979) studied this question.
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