多级计分题项目功能差异常用检测方法及比较

项目功能差异是确保测验公平的统计技术手段。多级计分题目为教育测量和心理测量中不可或缺的题型，而目前还未见有公开发表的文章较为全面地将常用多级计分题DIF检测方法作一概括，该文从参数类与非参数类2个视角对多级计分DIF检验方法进行论述与比较，为实践应用者在方法选用上提供借鉴及支持，最后对多级计分DIF检验进行讨论。

The Common DIF Detection Methods Introduction and Comparison for Polytomous Items

Differential item functioning( DIF)is a statistical technique to ensure a fair test. Multi-level scoring i-tems are indispensable for educational measurement and psychometrics,but there is still no published articles com-pletely described DIF detection method for multi-level scoring items in generally,this article class the non-paramet-ric polytomous DIF detection methods and parameters polytomous DIF detection methods,these two categories of such methods were described and compared,and follow-up development were discussed.