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Residualanalysis in the Polytomous Rasch Model

Published online by Cambridge University Press:  01 January 2025

Erling B. Andersen*
Affiliation:
University of Copenhagen
*
Requests for reprints should be sent to Erling B. Andersen, Department of Statistics, University of Copenhagen, 6 Studiestraede, DK-1455 Copenhagen, K, DENMARK.

Abstract

Residuals for check of model fit in the polytomous Rasch model are examined. Comparisons are made between using counts for all response pattern and using item totals for score groups for the construction of the residuals. Comparisons are also, for the residuals based on score group totals, made between using as basis the item totals, or using the estimated item parameters. The developed methods are illustrated by two examples, one from a psychiatric rating scale, one from a Danish Welfare Study.

Information

Type
Original Paper
Copyright
Copyright © 1995 The Psychometric Society

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