风靡全球的旋转舞者转向测试 其实是胡扯？
<p><span word="At">At</span> <span word="first">first</span> <span word="glance">glance</span>, <span word="it">it</span>'<span word="s">s</span> <span word="a">a</span> <span word="simple">simple</span> <span word="video">video</span> <span word="of">of</span> <span word="a">a</span> <span word="dancer">dancer</span> <span word="spinning">spinning</span>. <span word="However">However</span>, <span word="in">in</span> <span word="fact">fact</span> <span word="it">it</span> <span word="is">is</span> <span word="an">an</span> <span word="optical">optical</span> <span word="illusion">illusion</span> <span word="that">that</span> <span word="some">some</span> <span word="say">say</span> <span word="could">could</span> <span word="actually">actually</span> <span word="reveal">reveal</span> <span word="how">how</span> <span word="smart">smart</span> <span word="you">you</span> <span word="are">are</span>.</p><p>乍看，这是简单的舞者旋转视频。然而，事实上，这是种光学假象，有些人说这能体现出你有多智慧。</p><p><span word="It">It</span> <span word="plays">plays</span> <span word="with">with</span> <span word="the">the</span> <span word="brain">brain</span>'<span word="s">s</span> <span word="visual">visual</span> <span word="perception">perception</span> - <span word="some">some</span> <span word="see">see</span> <span word="her">her</span> <span word="spinning">spinning</span> <span word="clockwise">clockwise</span>, <span word="counterclockwise">counterclockwise</span> <span word="or">or</span> <span word="even">even</span> <span word="switching">switching</span> <span word="between">between</span> <span word="the">the</span> <span word="two">two</span>.</p><p>这玩的是大脑的视觉感知，人们会看出舞者按顺时针、逆时针旋转，甚至有人看出在两种旋转方式间切换。</p>
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