Rasching an Achievement Test

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Larry R. Nelson


In this paper I relate experiences gained in the process of moving data from Lertap, a
classical test theory (CTT) system, to ConQuest and Winsteps, two item response theory (IRT)
systems which have a particular focus on the Rasch model. The work reported below involves
matters of dimensionality, indices of model fit, measurement precision, and scaling.

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บทความวิจัย (Research Articles)