Item Response theory (IRT), as the base of CAT, is a theory of measurement based on mathematical model.
项目反应理论是CAT的基础，项目反应理论是一种建立在某种数学模型基础上的测量理论。
Item response theory (IRT) and cognitive psychology are two different research areas. It can offer more item information if we combine them together.
项目反应理论和认知心理学是两个不同的研究领域，把它们结合起来可以得到更多的题目信息。
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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