Does adaptive testing violate local independence?
Does adaptive testing violate local independence?
复制标题
自适应测试是否违反了本地独立性？
作者：
R. Mislevy;Hua
项目反应理论假定“局部独立性”，或项目反应的条件独立性，给定项目参数和考生的能力参数。然而，局部独立性的通常定义解决了固定测试的背景，并且最初似乎在自适应测试的背景下产生不正确的响应模式概率。通过引入额外的符号来处理项目选择机制，解决了这个悖论。
Item response theory posits “local independence,” or conditional independence of item responses given item parameters and examinee proficiency parameters. The usual definition of local independence, however, addresses the context of fixed tests, and initially appears to yield incorrect response-pattern probabilities in the context of adaptive testing. The paradox is resolved by introducing additional notation to deal with the item selection mechanism.