| 二级计分数据DIF模拟研究的数据产生原理及其软件实现 |
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| 引用本文： | 朱乙艺,焦丽亚.二级计分数据DIF模拟研究的数据产生原理及其软件实现[J].考试研究,2012(6):80-87,19. |
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| 作者姓名： | 朱乙艺 焦丽亚 |
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| 作者单位： | 北京师范大学教育学部教育统计与测量研究所;教育部考试中心评价研发中心 |
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| 摘 要： | 和基于实测数据的DIF研究相比，基于模拟数据的DIF研究不仅可以自由操纵实验条件，而且可以给出检验力和I型错误指标。本文详细阐述了二级计分DIF模拟数据的产生原理，其产生过程包括四个阶段：选择DIF产生思路，选择项目反应理论模型，确定考生特征、题目特征和复本数，计算考生在题目上的正确作答概率并转化为二级计分数据。并且分别利用常用软件Excel和专业软件WinGen3展示了二级计分DIF模拟数据的产生过程。
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| 关 键 词： | 项目功能差异 模拟研究 |
The Principle of Generating Dichotomous DIF Simulated Responses and the Generating Progress by Softwares |
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| Zhu Yiyi,Jiao Liya.The Principle of Generating Dichotomous DIF Simulated Responses and the Generating Progress by Softwares[J].Examinations Research,2012(6):80-87,19. |
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| Authors: | Zhu Yiyi Jiao Liya |
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| Institution: | 1 Educational Statistics and Measurement Institute,Beijing Normal University,Beijing,100875 2 National Education Examinations Authority,Ministry of Education,Beijing,100084 |
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| Abstract: | Compared to DIF study based on real data, DIF study based on simulated data not only can manipulate the experimental conditions freely, but also provide indicators of power and Type I error. This paper describes the principle of generating dichotomous DIF simulated response, including four phases： choosing the way to introduce DIF, selecting the item response theory model, setting examinee characteristics, item characteristics and number of replications, calculating subject＇ s probability of giving a correct response and transforming it into dichotomous response. The process of generating dichotomous DIF simulated response is showed by using the common software Excel and specialized software WinGen3 separately. |
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| Keywords: | Differential Item Functioning Simulation Study |
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