Abstract
Within the domain of latent trait models the Rasch model (Rasch, 1960) takes a prominent place. This fact can be accounted for by the special characteristics of the model deriving from specific objectivity. As a consequence, this one-parameter logistic model, as it is also called, has been studied extensively for the past decade. Also with respect to model testing the Rasch model has been studied more thoroughly than other latent trait models. For this reason we will concentrate in the present paper on testing the Rasch model. Most of the points made with respect to the Rasch model apply to other latent trait models as well.
Published Version
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