IRT Observed-score Kernel Equating
2014 (English)Report (Other academic)
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
Probability Theory and Statistics
IdentifiersURN: urn:nbn:se:uu:diva-224665OAI: oai:DiVA.org:uu-224665DiVA: diva2:717690