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三更雨~木虫 (文坛精英)
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【Share】We all see the world around us in a different way?
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The way we view the world depends on the size of the primary visual cortex, a small part of our brain, according to a new study carried out by researchers at University College London. Researchers showed a series of optical illusions to 30 healthy volunteers. These included the Ebbinghaus illusion, a well-known illusion in which two circles of the same size are each surrounded by circular "petals"; one of the circles is surrounded by larger petals, the other by smaller petals. And most people will see the first circle as smaller than the second one. In a second experiment called the "Ponzo" illusion the volunteers were shown two identically sized circles superimposed onto the image of a tunnel where the circle placed further back appears larger than that placed near the front. By adapting these illusions, the researchers were able to show that individual volunteers saw the illusions differently. Then Using brain scans the researchers can measure the surface area of the primary visual cortex in each volunteer and found a strong link between its size and the extent to which volunteers perceived the size illusion - the smaller the area, the more pronounced the visual illusion. This affects the way we see the world, meaning we all see the world differently researchers say. "Optical illusions mystify and inspire our imagination, but in truth they show us that how we see the world is not necessarily physically accurate, but rather depends a lot on our brains," researcher Schwarzkopf said. |
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nono2009
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