人类大脑无法判断对方性别


来源:环球时报
发布时间:2010-11-29 12:55:00
查看次数:

内容提要:长期以来神经科学家们一直认为大脑看待物体的方式同观察视角无关,而该研究结果证明原先的理论并不成立。

  The identical facial features might be judged male when they are viewed in one part of our field of view, but thought of as female in another location, a recent study suggests.

  Researchers from the Massachusetts Institute of Technology's McGovern Institute for Brain Research in Boston showed volunteers a series of faces, ranging from highly feminine to extremely masculine, and asked to say if they were male or female. Participants were told to fix their gaze on the centre of a computer screen as the faces flashed at different locations for 50 milliseconds.

  The patterns were different for different people, the scientists reported. Some individuals judged an androgynous face as female every time it appeared in the upper right corner of the screen, while others saw it as male.

  "Sampling bias" is the likely explanation, say the scientists. The visual cortex, which processes images, contains cells grouped according to which part of a scene they analyze. Within each group, there is thought to be a relatively small number of neurons devoted to interpreting the gender of faces. The smaller the image, the fewer cells are activated. As a result, cells in one group might be mostly those responding to male faces, while in a different part of the visual cortex female-responding cells dominate.

  In addition, in the real world the effect is not noticed because there are so many other gender clues, such as hair and clothing. And experiments using computer-generated faces stripped of all other gender-identifying features showed how hard the brain finds it to tell sexes apart.

  The findings challenge a longstanding belief of neuroscientists - that how the brain sees an object should not depend on where the object is located relative to the observer.

第1页 第2页

相关文章
·双语阅读 ︱《狂飙》英文名The Knockout你知道是什么意思吗?02-03
·双语阅读 Smartphone addiction 手机成瘾08-11
·双语阅读 非洲野生大象用类似名字的叫声互相称呼03-02
·吻瘫机场却赢得芳心05-04
·提升你的英语阅读技巧 (中英对照)08-24
·“填志愿”、“录取通知书”英文怎么说?07-07
·高考英语写作参考:英语哲理名言警句05-18
·Aiming for a Deal on Climate Change12-21
·双语阅读 | 时隔12年,中国女篮再夺亚洲杯冠军!07-04
·27岁中国女导演在戛纳荣获短片金棕榈奖,2分钟中英文获奖感言谈向06-22
最新文章
阅读排行