Ebbinghaus illusion

== English == === Etymology === Named after its discoverer, the German psychologist Hermann Ebbinghaus (1850–1909). === Noun === Ebbinghaus illusion (plural Ebbinghaus illusions) An optical illusion whereby a disk appears smaller if surrounded by larger disks than if by smaller. ==== Translations ==== ==== Further reading ==== Ebbinghaus illusion on Wikipedia.Wikipedia