题目难度与辨别力指数关系的注记。

Journal of applied measurement Pub Date : 2019-01-01

Xiaofeng Steven Liu

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引用次数: 0

摘要

在真分理论中，题难度和辨别性指标常被用来评价试题和诊断可能存在的问题。这两项统计数据比文献所显示的更为相关。特别地，辨别指数可以通过题目难度和题目表现与总测试分数之间的相关性在数学上确定。

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A Note on the Relation between Item Difficulty and Discrimination Index.

Item difficulty and discrimination index are often used to evaluate test items and diagnose possible issues in true score theory. The two statistics are more related than the literature suggests. In particular, the discrimination index can be mathematically determined by the item difficulty and the correlation between the item performance and the total test score.

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Journal of applied measurement

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