等级记分模型下几种等值方法的比较研究

Comparison Study of Several Equating Methods under Grade Response Model

等值对考试具有重要意义,而我国的大部分考试却没有实现等值,在少数经过等值的考试中,大多只限于对二级记分题目的等值,鲜有对多级记分题目的等值研究。该研究针对包含多级记分题目的国内某大型语言类考试,探讨了等级反应模型下的同时校准法、固定共同题参数法以及链接独立校准法中的平均数标准差方法、平均数平均数方法、Haebara法和Stocking-Lord法六种等值方法的效果,从而优选最适合该考试的等值方法。

To equating tests is very important,but most of the tests are not equating in China.The tests which equating are only contain the dichotomous items in domestic but not the polychromous items.This study is choosing the best equivalent method for a large-scale language test which included polychromous items,and discussing the effect of those equivalent methods： Concurrent calibration, Fixed common item parameters, Linking separate calibration（Mean/Sigma,Mean/Mean Haebara and Stocking-Lord）, under the Grade Response Model.