A Note on the Relation between Item Difficulty and Discrimination Index

Xiaofeng Steven Liu

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A Note on the Relation between Item Difficulty and Discrimination Index

机译：关于物品难度与歧视指数关系的说明

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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.

机译：物品难度和歧视指数通常用于评估测试项目并诊断真实得分理论中可能的问题。这两个统计数据比文献暗示更相关。特别地，可以通过项目难度和项目性能与总测试分数之间的相关性来数学确定歧视索引。

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《Journal of applied measurement》 |2019年第2期|221-226|共6页
作者
Xiaofeng Steven Liu;
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University of South Carolina;

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正文语种 eng
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2. The Effect of Interactions between Item Discrimination and Item Difficulty on Fit Statistics [J] . Stephen Mark Humphry, Ken Bredemeyer Journal of applied measurement . 2020,第4期

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3. Item Writer Judgments of Item Difficulty Versus Actual Item Difficulty: A Case Study [J] . Tetyana Sydorenkoa* Language Assessment Quarterly . 2011,第1期

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4. (23) MEASURING ICT SKILLS: RELATIONSHIP OF THE ITEM DIFFICULTY AND CHARACTERISTICS OF TEST ITEMS [C] . M.T. Kaarakainen International Technology, Education and Development Conference . 2018

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5. The relationship between item difficulty and discrimination indices in multiple-choice tests in a physical science course [D] . Hotiu, Angelica 2006

机译：物理课程选择题测试中项目难度与辨别指数之间的关系
6. The impact of item-writing flaws and item complexity on examination item difficulty and discrimination value [O] . Bonnie R. Rush, David C. Rankin, Brad J. White 2016

机译：项目写作缺陷和项目复杂度对考试项目难度和鉴别价值的影响
7. The impact of item-writing flaws and item complexity on examination item difficulty and discrimination value [O] . Rush Bonnie R., Rankin David C., White Bradley J. 2016

机译：项目写作缺陷和项目复杂度对考试项目难度和鉴别价值的影响

A Note on the Relation between Item Difficulty and Discrimination Index

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