We use MH Method to detect the DIF, and do Standardized Distractor Analysis Method to distinguish which item having DIF is true and search the reasons causing this DIF.
我们采用MH方法检测DIF，利用标准化的离散分析方法鉴别dif的真伪，并寻找造成DIF的原因。
The first design assumed that anchor items all have a DIF level of 0 and the second one assumed that there were 35% of anchor items having non-negligible DIF levels.
第一种情境是完美设定即假设为定锚试题中DIF 程度设定为0， 第二种情境假设定锚试题中有 35%的试题 有某种程度的 DIF。
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