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  3. Facebook is facing criticism after it emerged it had conducted a psychology experiment on nearly 700,000 users without their kno

Facebook is facing criticism after it emerged it had conducted a psychology experiment on nearly 700,000 users without their kno

admin2014-11-27  48
问题     Facebook is facing criticism after it emerged it had conducted a psychology experiment on nearly 700,000 users without their knowledge. The test saw Facebook "manipulate" news feeds to control which emotional expressions the users were exposed to. The research was done in collabora tion with two US universities to find out if "exposure to emotions led people to change their own posting behaviours".
    Facebook said there was "no unnecessary collection of people’ s data." "None of the data used was associated with a specific person’s Facebook account," the social networking giant added. Cornell University and the University of California at San Francisco were involved in the study.
    But some have criticised the way the research was conducted and raised concerns over the impact such studies could have. "Let’ s call the Facebook experiment what it is: a symptom of a much wider failure to think about ethics, power and consent on platforms," Kate Crawford posted on Twitter. Lauren Weinstein tweeted: "Facebook secretly experiments on users to try making them sad."
    Meanwhile, Labour MP Jim Sheridan has called for an investigation into the matter. "This is extraordinarily powerful stuff and if there is not already legislation on this, then there should be to protect people. They are manipulating material from people’ s personal lives and I am worried about the ability of Facebook and others to manipulate people’ s thoughts in politics or other areas. If people are being thought-controlled in this kind of way there needs to be protection and they at least need to know about it."
    However, Katherine Sledge Moore, a psychology professor at Elmhurst College, Illinois, said: "Based on what Facebook does with their newsfeed all of the time and based on what we’ ve agreed to by joining Facebook, this study really isn’t that out of the ordinary. The results are not even that alarming or exciting."
    The research was conducted on 689,000 Facebook users over a period of one week in 2012. According to the report on the study: "The experiment manipulated the extent to which people were exposed to emotional expressions in their News Feed". The study found that users who had fewer negative stories in their news feed were less likely to write a negative post, and vice versa.
How did Facebook conduct this experiment?
选项 A、They collect people’ s data from their posts.
B、They control the degree of people’ s exposure to emotional expressions.
C、They influence people’ s posting behaviours through News Feed.
D、They offer only negative news to people.
答案B
解析 细节题。根据题干中的conduct this experiment可以定位到文中The experiment manipulated the extentto which people were exposed to emotional expressions in their News Feed．可知它通过控制新闻提要来控制人们接触情感性报道的程度来实验。A项与事实不符，C项不是实验方法。D项太片面了．他们提供正反两方面信息。因此，正确答案是B。
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