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Download full textXu, Xueli; Jia, Yue – Educational Testing Service, 2011
Estimation of item response model parameters and ability distribution parameters has been, and will remain, an important topic in the educational testing field. Much research has been dedicated to addressing this task. Some studies have focused on item parameter estimation when the latent ability was assumed to follow a normal distribution,…
Descriptors: Test Items, Statistical Analysis, Computation, Item Response Theory
