概括
差异性项目功能 (DIF) 发生在测试项目测量不同能力时. 本研究使用二维多维物品响应理论 (MIRT) 检查了DIF,提供了对其原因和缓解策略的见解.
科学领域:
- 心理测量 心理测量 心理测量
- 教育测量教育的测量
- 项目响应理论.
背景情况:
- 差异物品功能 (DIF) 是测试中的标准分析.
- 当项目测量不同的能力复合物和组具有不同的能力分布时,DIF可能会出现.
- 现有研究强调了在DIF分析中忽视维度的后果.
研究的目的:
- 从二维多维物品响应理论 (MIRT) 的角度来研究DIF.
- 为了说明补偿MIRT模型和项目和复合材料的图形表示.
- 研究三种基于MIRT的方法来理解DIF.
主要方法:
- 使用一个二维的多维物品响应理论 (MIRT) 框架.
- 审查一维IRT模型对二维数据的后果的分析研究.
- 调查具有不同能力分布的统一/非统一DIF,对全部潜在能力空间进行核算,以及基于场景的DIF.
主要成果:
- 项目参数可以根据潜在能力分布而有所不同.
- 在IRT模型中忽视维度性可能会导致DIF检测不准确.
- 考虑完整的潜在能力空间有助于减轻DIF效应.
- 不同的解决问题的方法会导致DIF,即使分布相同.
结论:
- 两维的MIRT视角为理解DIF提供了一个强大的框架.
- 准确的DIF分析需要考虑整个潜在能力空间和潜在的基于场景的原因.
- 识别标记物品中DIF的根本原因仍然是一个关键的挑战.
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