Gray lines appear to tilt alternately, though they are parallel.pic.twitter.com/k8WYIXMdEB
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I am an experimental psychologist who studies visual illusions as well as makes illusion artworks. #illusion #opticalillusion #perception #錯視
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Gray lines appear to tilt alternately, though they are parallel.pic.twitter.com/k8WYIXMdEB
am trying to figure out why this illusion works so well. If I squint my eyes real tight the illusion disappears, so I'm thinking it has to do with the way the semicircles are shaded.
It is the Café Wall illusion (Münsterberg illusion). http://www.psy.ritsumei.ac.jp/~akitaoka/cafewalle.html …pic.twitter.com/hdEVPHxm4I
Münsterberg, H. (1897) Die vershobene Schachbrettfigur. Zeitschrift für Psychologie, 15, 184-188. Gregory, R. L. and Heard, P. (1979) Border locking and the Café Wall illusion. Perception, 8, 365-380.
Actually, Fraser (1908) demonstrated the Café Wall illusion. Fraser, J. (1908) A new visual illusion of direction. British Journal of Psychology, 2, 307-320.
Kitaoka, A., Pinna, B., and Brelstaff, G. (2004). Contrast polarities determine the direction of Café Wall tilts. Perception, 33, 11-20. Kitaoka, A. (2007) Tilt illusions after Oyama (1960): A review. Japanese Psychological Research, 49, 7-19.https://onlinelibrary.wiley.com/doi/10.1111/j.1468-5884.2007.00328.x …
thanks for these links. Looking forward to reading these.
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