对IRT局部独立性假设问题的认识

On the Assumption of Local Item Independence in Item Response Theory

本文对项目反应理论(IRT)局部独立性问题的主要研究成果进行了文献梳理。在此基础上,阐释局部独立性假设的定义。文章同时就局部独立性与测验维度的关系,局部依赖的甄别与计算、起因和控制程序,以及局部依赖对测量实践的影响进行讨论,并探讨了题组中局部题目依赖问题的解决策略。

This paper gives summary of the main research on local item independence in Item Response Theory. Based upon it, the author explains on the definition of local item independence in detail, discusses the relationship of local independence and test dimensionality, expounds definition, detection and calculation, cause and controlling procedures of local item dependence, and its effects on measurement practice. This paper also suggests the solving strategies to the local item dependence in testlet.