The detection of differential item functioning (dif) is crucial to ensuring the fairness of tests, which is an important approach to test if the item is biased or not.
项目功能差异(DIF)检验是保证测验公平性的需要，也是判别测验题目是否有偏差的重要步骤。
The detection of differential item functioning (dif) is crucial to ensuring the fairness of tests, which is an important approach to test if the item is biased or not.
项目功能差异(DIF)检验是保证测验公平性的需要，也是判别测验题目是否有偏差的重要步骤。
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