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Using differential item functioning to evaluate potential bias in a high stakes postgraduate knowledge based assessment

机译:使用差异项功能评估高风险研究生基于知识的评估中的潜在偏见

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摘要

BackgroundFairness is a critical component of defensible assessment. Candidates should perform according to ability without influence from background characteristics such as ethnicity or sex. However, performance differs by candidate background in many assessment environments. Many potential causes of such differences exist, and examinations must be routinely analysed to ensure they do not present inappropriate progression barriers for any candidate group. By analysing the individual questions of an examination through techniques such as Differential Item Functioning (DIF), we can test whether a subset of unfair questions explains group-level differences. Such items can then be revised or removed.
机译:背景公正是辩护评估的重要组成部分。候选人应根据能力表现,不受种族或性别等背景特征的影响。但是,在许多评估环境中,性能因候选人背景而异。存在造成这种差异的许多潜在原因,必须对检查进行例行分析,以确保它们不会对任何候选组造成不适当的进展障碍。通过使用差异项功能(DIF)等技术分析考试中的单个问题,我们可以测试不公平问题的子集是否可以解释小组级别的差异。然后可以修改或删除此类项目。

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