基于RSM对Q矩阵相同的无锚题测验的等值

传统锚题-非等组设计下的测验等值,等值要求的满足具有主观性,并且由于锚题失效或难以获得等因素的影响,则该方法的使用受到了限制。因此,本研究基于规则空间模型的Q矩阵理论,生成两个Q矩阵相同但无锚题的测验的共同受测者,使用共同组设计,利用同时性估计的方法对测验进行等值,并考虑了作答失误率和测验结构对等值稳定性的影响。结果表明:共同组设计同时估计方法的等值稳定性取得了优于或等于锚题-非等组同时估计方法;失误率的增大也会导致等值稳定性的下降;并且不同的测验结构也对等值稳定性产生了影响,其中直线型和收敛型结构稳定性较好,发散型和无结构型较差。

Equating Tests in Same Q Matrix with No Common Items Based on the Rule Space Model

Test equating involves aspects such as equating requirements,equating design,equating methods and so on.In equating requirements,the equal construct requirement has no formula to justify,so it leads to equating misuse.In equating practice,we usually use non-equivalent groups with the anchor test(NEAT) design to obtain a common scale,and the equating accuracy mainly depends on the common items' quality(Dorans,Holland,2006).When the common items' parameters have drifted or the content exposed,the equating res...