博文
看图测左右脑：原来是“谣传”
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下面的这个图片说是可以根据你看到的是逆时针还是顺时针来判定是左脑型还是右脑型：
我觉得给出的答案（顺时针对应右脑型）是有问题的，因为我一直以为自己是左脑型，但看到的是顺时针。
当然，我左手也比较有劲，也确实可能是右脑型。
不管怎样，认真上网调查下，在wiki上面找到关于The Spinning Dancer或者 silhouette illusion有关的词条：
说是这是一个错误的说法。并且有数据显示，超过2/3的人看到的是顺时针：
The illusion has been incorrectly[3] identified as a scientific personality test that supposedly reveals whichhemisphere of the brain is dominant in the observer. Under this unproven interpretation, it has been popularly called the Right Brain–Left Brain test,[4] and was widely circulated on the Internet during late 2008 to early 2009.[citation needed] During this time it was established that the silhouette is more often seen rotating clockwise than counter-clockwise. According to an online survey of over 1600 participants, approximately two thirds of observers initially perceived the silhouette to be rotating clockwise. In addition, observers who initially perceived a clockwise rotation had more difficulty experiencing the alternative.[5]
不过，虽然文章
声明下面的看图测试是有问题的（纯属nonsense）,但我还是觉得这个图要比上面的图更靠谱，
因为如果你能很快找到这个图里面的人头的话，可能就是大脑的图像功能比较发达：
最后，关于原来的舞女的图，有一个逻辑狂人更是通过做两条辅助线就破解了大脑在信息缺乏的情况下，
确实会“随便”下结论。
下面两个图其实是完全一样的，只是加了不同的辅助线：
拍到一起的话，你还会觉得她们的旋转方向一样：
https://blog.sciencenet.cn/blog-461456-490663.html
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