单组设计中三种基于CTT的等值方法群体不变性的研究  

A Study of Group Invariance of Three Equating Methods Based on CTT in Single Group Design

作　　者：陆一萍[1] 

机构地区：[1]北京语言大学汉语水平考试中心

出　　处：《中国考试》2013年第11期22-28,共7页journal of China Examinations

基　　金：国家社会科学基金青年项目"基于网络的汉语水平自测系统研究"资助(项目编号:12CYY028)

摘　　要：本研究对单组设计中平均数等值、线性等值和等百分位等值三种等值方法的群体不变性进行了探讨。研究数据来自中国汉语水平考试,考生按性别被分为不同的子群体。研究结果表明,平均数等值和线性等值两种方法在子群体和总体考生中的等值转换关系很接近,具有较好的群体不变性;而等百分位等值法在子群体和总体考生中的等值结果差异较大,群体不变性较差。This study investigated the group invariance of mean, linear and equipercentile equating methods in single group design. The data were selected from the HSK database and examinees were divided into different subgroups based on gender. Results indicated that for the mean and linear equating, the conversions obtained from different subgroups were similar to that from the total group and both the methods were indepnent of examinee group; while for the equipercentle equating, the conversions obtained from different subgroups were different from that obtained by using the total group and equating functions were not invariant across different subgroups of examinees.

关 键 词：群体不变性 单组设计 平均数等值 线性等值 等百分位等值 

分 类 号：G405[文化科学—教育学原理]