Testing Rasch Models For Polytomous Items: With An Example Concerning Detection Of Item Bias
Door: Glas, C.A.W. | 01-02-1991 Recently Glas and Verhelst (1989) introduced a genera! theoretica! framework for the construction of asymptotically x2-dlstributed test statistics for item response models.As an example they proposed two statistics for the partial credit model wlth a normal ability distributlon. Also the statistlcs for the Rasch model for dlchotomous items proposed by Glas (1988) fit into the given framework. In the present paper the theory is applied to the construction of a statistic for some item response models for polytomous items, including the partial credit model. The statistic is deflned In a conditional maximum likelihood (CMU) framework.
An example concerning detection of item bias will be included.
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