...变量的数据均来自员工方面的调 查问卷，在问卷调查时，如果所有题项均由同一填写者填写，就容易出现同源偏差（same source bias）的问题。
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same source bias
相同源偏差
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Comparing winners and also-rans from within the same countries, to avoid yet another source of bias, Dr Rablen and Dr Oswald found that the winners lived, on average, two years longer than those who had merely been nominated.
ECONOMIST: Is two years extra life
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