Ebbinghaus illusion

a size contrast illusion in which a concentric ring of large circles makes a medium-sized circle in the center of the ring look small, whereas the same circle in the center of a ring of smaller circles looks large. Also called Titchener circles; Titchener illusion. [introduced in the 1890s by Hermann Ebbinghaus but sometimes incorrectly attributed to Edward Bradford Titchener]

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Psychology term of the day

September 8th 2024

speciesism

n. discriminatory, prejudicial, or exploitative practices against nonhuman animals, often on the basis of an assumption of human superiority. See also animal rights. —speciesist n., adj.