IRT true score equating and IRT observed score equating in common-item non-equivalent group design based on the item response theory were compared.

研究采用锚测验非等组设计，对IRT真分数等值和IRT观察分数等值两种方法进行了比较研究。

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Technical services or an equivalent functional group has primary responsibility for documenting the design.

技术服务或相当的职能部门负有设计文档的基本责任。

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