What is the major paper for polytymous graded IRT?
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The major paper for polytomous graded IRT is the one by ^[Classe and Steyer]. They introduce a probit multistate IRT model for ordinal response variables, which includes a reference latent state variable for each occasion of measurement and a latent item effect variable for each item except for one reference item. The model assumes that the latent item effect variables are identical for all occasions of measurement. The paper demonstrates the application of this model to a real data example and shows that including item effect variables significantly improves model fit, indicating that the items are not strictly unidimensional within each occasion of measurement.^[Classe and Steyer]
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34 Citations | The provided paper does not mention a specific major paper for polytomous graded IRT. |
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13 Citations | The provided paper does not mention a specific major paper for polytomous graded IRT. |
Open access 01 Jan 2015 2 Citations | The provided paper does not mention a specific major paper for polytomous graded IRT. |
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