{"id":4374,"date":"2012-05-11T16:14:55","date_gmt":"2012-05-11T14:14:55","guid":{"rendered":"http:\/\/neuropoolwp-com.beast-hosting.com\/2012\/05\/11\/optische-taeuschung-ebbinghaus-illusion\/"},"modified":"2012-05-11T16:14:55","modified_gmt":"2012-05-11T14:14:55","slug":"optische-taeuschung-ebbinghaus-illusion","status":"publish","type":"post","link":"https:\/\/www.neuropool.com\/en\/reports\/surprise-of-the-day\/optische-taeuschung-ebbinghaus-illusion.html","title":{"rendered":"Optical illusion: Ebbinghaus illusion"},"content":{"rendered":"<p style=\"text-align: center;\"><img fetchpriority=\"high\" decoding=\"async\" src=\"newimages\/2012\/Optische%20T%C3%A4uschung%20Ebbinghaus%20Illusion.jpg\" alt=\"Optical illusion Ebbinghaus Illusion\" width=\"450\" height=\"318\" \/><\/p>\n<p>The Ebbinghaus illusion is also known as Titchen circles and illustrates an optical illusion through relative size perspective.<\/p>\n<p><!--more--><\/p>\n<p>The best-known representation of this illusion is two circles of identical diameter, one surrounded by small circles and one by larger circles. The size of the two central circles is perceived differently by the size of the surrounding circles.<\/p>\n<p>This optical illusion was discovered by the German psychologist Hermann Ebbinghaus at the end of the 19th century. It became known in the English-speaking world through a book on experimental psychology by Titchener in 1001.<\/p>\n<p>The decisive factor in this illusion is not the illusion of the differently perceived sizes of the circles, but the distance of the surrounding circles, the distance of the two circles in the centre from each other and the completeness of the wreath. If the surrounding circles are closer to the centre circle, it appears larger; if the distance of the surrounding circles to the centre circle is further, it appears smaller. The size of the surrounding circles determines how far they can be from the centre circle.<\/p>\n<\/p>\n<p>The figure above illustrates the phenomenon of the Ebbinghaus illusion without using the surrounding circles. The brick pattern of the surroundings tempts the brain to think in perspective, which is why the right-hand circle is seen as being further away. The blurred appearance of the circle reinforces this impression. Since it is perceived as being further away, it must therefore also be much larger than the left circle, which appears to be directly in front of the observer. In fact, both circles or spheres are identical in size.<\/p>\n<p style=\"text-align: center;\"><img decoding=\"async\" class=\"size-full wp-image-4373\" src=\"https:\/\/www.neuropool.com\/wp-content\/uploads\/2012\/05\/Ebbinghaus-Illusion-2.jpg\" alt=\"Ebbinghaus Illusion \" width=\"450\" height=\"318\" srcset=\"https:\/\/www.neuropool.com\/wp-content\/uploads\/2012\/05\/Ebbinghaus-Illusion-2.jpg 450w, https:\/\/www.neuropool.com\/wp-content\/uploads\/2012\/05\/Ebbinghaus-Illusion-2-300x212.jpg 300w\" sizes=\"(max-width: 450px) 100vw, 450px\" \/><\/p>","protected":false},"excerpt":{"rendered":"<p>The Ebbinghaus illusion is also known as Titchen circles and illustrates an optical illusion through relative size perspective.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_fgj2wp_old_id":["3284"],"rank_math_analytic_object_id":["975"],"rank_math_focus_keyword":["optische t\u00e4uschung: ebbinghaus-illusion"],"rank_math_og_content_image":["a:2:{s:5:\"check\";s:32:\"ec4f69a97e108e9d53945d4e41b83275\";s:6:\"images\";a:0:{}}"],"rank_math_internal_links_processed":["1"],"_trp_automatically_translated_slug_en_GB":["optical-deception-ebbinghaus-illusion"]},"categories":[10],"tags":[],"class_list":["post-4374","post","type-post","status-publish","format-standard","hentry","category-surprise-of-the-day","entry"],"_links":{"self":[{"href":"https:\/\/www.neuropool.com\/en\/wp-json\/wp\/v2\/posts\/4374","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.neuropool.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.neuropool.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.neuropool.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.neuropool.com\/en\/wp-json\/wp\/v2\/comments?post=4374"}],"version-history":[{"count":0,"href":"https:\/\/www.neuropool.com\/en\/wp-json\/wp\/v2\/posts\/4374\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.neuropool.com\/en\/wp-json\/wp\/v2\/media?parent=4374"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.neuropool.com\/en\/wp-json\/wp\/v2\/categories?post=4374"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.neuropool.com\/en\/wp-json\/wp\/v2\/tags?post=4374"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}