Second-order texture contrast resolves ambiguous apparent motion

Mather, George and Anstis, Stuart (1995) Second-order texture contrast resolves ambiguous apparent motion. Perception, 24 (12). pp. 1373-1382. ISSN 0301-0066

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When a black and a white square on a grey surround exchange places, it was previously shown that on a dark surround it is the white square, and on a light surround it is the black square, that is seen in apparent motion (AM). Thus the higher-contrast square carries the AM. We now show that the same is true for second-order AM of texture-defined squares. Squares were defined by four different textures: by anisotropy (horizontal versus vertical random dashes), by alpha numeric letters, by hash marks, or by dot size. The result was that the square that differed more from the surround in texture properties carried the second-order AM. Judgments of texture salience revealed a high correlation between salience and apparent motion. In a third experiment, crossover AM between dissimilar textures was investigated, and it was found that the more salient textures carried the AM. Results cannot be explained by the concept of "texture activity', but instead indicate that the system extracts a measure of "texture contrast' prior to analysis of salience and apparent motion.

Keywords:anisotropy, article, computer graphics, contrast sensitivity, human, luminescence, movement perception, vision, Anisotropy, Humans, Luminescent Measurements, Motion Perception, Visual Perception
Subjects:B Subjects allied to Medicine > B140 Neuroscience
C Biological Sciences > C830 Experimental Psychology
Divisions:College of Social Science > School of Psychology
ID Code:16127
Deposited On:03 Dec 2014 16:40

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