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  3. Back in the 1 870 s，Charles Darwin’s cousin Francis Gahon wanted to define the face of a criminal．He assembled photographs of me

Back in the 1 870 s，Charles Darwin’s cousin Francis Gahon wanted to define the face of a criminal．He assembled photographs of me

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问题 Back in the 1 870 s，Charles Darwin’s cousin Francis Gahon wanted to define the face of a criminal．He assembled photographs of men convicted of heinous crimes and made a composite by lining them up on a single photographic plae The surprise：everybody liked the villain，including Gahonhimself．He reasoned that the villainous irregularities he supposed belonged to criminal faces had disappeared in the averaging process．In the next century，scientists began to show reliably thatfaces combined digitally on computers were likable--more so than the individual faces from which they were composed Although people clearly admire the long legs of Brazilian model Ana Hickmann or Dolly Parton’s breasts，in general humans like averages．
    Researchers confirmed that humans judge real faces by their differences or similarities from anorm．But they also found that the norm can change quickly．When researchers showed 1 64 peoplesets of 100 computer—generated faces representing a slow transition from male to female and from Japanese to Caucasian--it turned out that the test subjects’idea of what constitute an“average”face shifted depending on the first face they saw．When they were flashed a supermasculine face first，more faces on the spectrum impressed them，by contrast，as female The masculine face had，in effect，set a standard From then on，other faces had to be more masculine in order to rate as be longing to the gender．the study note a similar shift using a Scale of faces moving from surprise to  1‘disgust．
    The authors，who published their results in the journal Nature，conclude that in real life we al so quickly change our perception of the midpoint--what’s normal--depending on what we see We may not be aware that our judgment has changed；we simply see differently，says Michael Wel)ster，a psychologist at the University of Nevada in Reno and coauthor of the study．
  One implication is that individual and social attitudes toward what’s acceptable，and what’s beautiful，change over time “If you look at plastic—surgery trends”，in the 1950s and 1960s you saw little upturned noses，notes Harvard psychologist Nancy Etcoff，author of the book Survival of the Prettiest：The Science of beauty．“Now the noses are broader and the lips are plumper．We’re seeing images from around the globe and it’s changing our idea of the average”So if you’re unhappy with some aspect of your face，take comfort：beauty，is a moving target．
By mentioning the experiment in the second paragraph，the author implies that________．
选项 A、our definition of what’s normal varies with gender
B、our focus of attention varies with gender and age
C、our definition of what’s average changes over time
D、our focus of attention is distracted when interfered
答案C
解析 事实细节题。由题干信息定位至第二段。由段首可知人是通过辨别人脸与标准面孔的异同对其进行判断的，但是“the norm can change quickly”，然后根据实验证明“the test subjects’idea of what constitute an‘average’face shifted depending on the first face they saw．”可见人们关于标准面孔的定义是随时间在改变的，故C为答案；本段主旨与性别无关，排除A和B；D在文中没有提及，故排除。
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