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从多维IRT视角检查不同项目的运作

Terry A Ackerman1, Ye Ma2

  • 1The University of Iowa.

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此摘要是机器生成的。

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.

关键词:
补偿和非补偿的MIRT模型.差异性项目的功能.这是一个多维的IRT.

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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.