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Common Item Equating Using the Loglinear Rasch Model

Author

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  • Henk Kelderman

Abstract

A method is proposed to equate different sets of items administered to different groups of individuals using the Rasch model. A Rasch equating model is formulated that describes one common Rasch scale in different groups with different but overlapping sets of items. The item parameters can then be estimated simultaneously, avoiding different parameter estimates of common items in different groups. The model can be tested globally to test the hypothesis of one common Rasch scale, and the goodness of link can be tested. The method is based on the quasi-loglinear Rasch model.

Suggested Citation

  • Henk Kelderman, 1988. "Common Item Equating Using the Loglinear Rasch Model," Journal of Educational and Behavioral Statistics, , vol. 13(4), pages 319-336, December.
    • Handle: RePEc:sae:jedbes:v:13:y:1988:i:4:p:319-336
    DOI: 10.3102/10769986013004319
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