utb “Wandering Circles illusion” (many more at the Caplovitz lab!)



“Contour persistence” (does the circular contour disappear right away?)… But how about this one? (the circle should disappear more abruptly, because they have been physically removed; see related research article)… You can also experience this kind of visual persistence in web-based adaptation of David Regan’s bird demo. [another version can be viewed on Michael Bach’s fantastic visual illusions website]



The “Lemon illusion” is “subtle and insidious” (#lemonillusion)



A novel stimulus with which to study perceptual organization:  “Dot-sampled grids” elicit multistable curvilinear percepts (related research article)


More coming soon…!