文章基本信息

标题：equateIRT: An R Package for IRT Test Equating
本地全文：下载
作者：Michela Battauz
期刊名称：Journal of Statistical Software
印刷版ISSN：1548-7660
电子版ISSN：1548-7660
出版年度：2015
卷号：68
期号：1
页码：1-22
语种：English
出版社：University of California, Los Angeles
摘要：The R package equateIRT implements item response theory (IRT) methods for equating different forms composed of dichotomous items. In particular, the IRT models included are the three-parameter logistic model, the two-parameter logistic model, the one-parameter logistic model and the Rasch model. Forms can be equated when they present common items (direct equating) or when they can be linked through a chain of forms that present common items in pairs (indirect or chain equating). When two forms can be equated through different paths, a single conversion can be obtained by averaging the equating coefficients. The package calculates direct and chain equating coefficients. The averaging of direct and chain coefficients that link the same two forms is performed through the bisector method. Furthermore, the package provides analytic standard errors of direct, chain and average equating coefficients.
关键词：bisector;chain;equating;equating coefficients;IRT;Rasch model;standard errors