Summary
Model misfit in NIRT means that one or more of the items violate the assumptions of unidimensionality, local independence or monotonicity. General tests detect whether model misfit occurs. Specific item misfit tests detect which item is violating the assumptions. Two methods to detect general and item misfit are presented: the Mokken scale approach and the ordered latent class approach. The results show that the item specific Mokken approach and the ordered latent class approach detect items with decreasing or unimodal IRFs. The Mokken approach also warns for IRFs which are nearly flat.
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© 2003 Springer Japan
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van Onna, M.J.H. (2003). General and Specific Misfit of Nonparametric IRT-models. In: Yanai, H., Okada, A., Shigemasu, K., Kano, Y., Meulman, J.J. (eds) New Developments in Psychometrics. Springer, Tokyo. https://doi.org/10.1007/978-4-431-66996-8_26
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DOI: https://doi.org/10.1007/978-4-431-66996-8_26
Publisher Name: Springer, Tokyo
Print ISBN: 978-4-431-66998-2
Online ISBN: 978-4-431-66996-8
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