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Methods: To construct the definition formulas of reliability coefficient based on reliability definition.
方法: 根据信度定义构造信度系数的定义式.
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The reliability coefficient of the multiple - choice cloze was estimated by the Kuder - Richardson 20 ( K - R 20 ).
多项选择式完形填空题的信度以K -R 20来计算.
信度系数???
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