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Chances are you’ve encountered some version of the “Ebbinghaus illusion,” in which a central circle appears to be smaller when encircled by larger circles and seems larger when surrounded by smaller circles. It’s an example of context-dependent size perception. But is this unique to humans or are some animals susceptible as well? According to a new paper published in the journal Frontiers in Psychology, it might depend on the specific sensory environment, since the illusion relies on contextual…
