Abstract
When a cross of either static or moving texture is inserted in the intersection of an Ehrenstein figure, we find that the texture and its motion appear to spread outside of the cross. We suggest that these phenomena are analogous to neon color spreading, wherein an interpretation of a transparent surface makes the properties of that surface, which are physically visible only inside the cross, appear to spread over its apparent extent. In our experiments, the texture and the motion of the cross are attributed to the transparent surface. In addition, the spreading changes the apparent aperture within which the texture and its motion are seen, leading to a corresponding change in the apparent direction of motion.
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This work was supported by JSPS Grant 1421 to Takeo Watanabe and AFOSR Grant 31-760-7409-2-30 to Patrick Cavanagh.
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Watanabe, T., Cavanagh, P. Texture and motion spreading, the aperture problem, and transparency. Perception & Psychophysics 50, 459–464 (1991). https://doi.org/10.3758/BF03205062
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DOI: https://doi.org/10.3758/BF03205062