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IRT Observed-score Kernel Equating
Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Statistics.
Umeå University.
2014 (English)Report (Other academic)
Abstract [en]

Item response theory (IRT) observed-score kernel equating is described for thenon-equivalent groups with anchor test equating design using either chain equating orpost-stratification equating. The equating function is treated in a multivariate setting andthe asymptotic covariance matrices of IRT observed-score kernel equating functions arederived. Equating is conducted using the two-parameter and three-parameter logisticmodels with simulated data and data from a standardized achievement test. The resultsshow that IRT observed-score kernel equating offers small standard errors and low equatingbias under most settings considered.

Place, publisher, year, edition, pages
Working paper / Department of Statistics, Uppsala University, 2
National Category
Probability Theory and Statistics
URN: urn:nbn:se:uu:diva-224665OAI: oai:DiVA.org:uu-224665DiVA: diva2:717690
Available from: 2014-05-16 Created: 2014-05-16 Last updated: 2014-05-16Bibliographically approved

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Andersson, Björn
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