Item Response Theory Observed-Score Kernel Equating
(English)Article in journal (Refereed) Submitted
Item response theory (IRT) observed-score kernel equating is introduced for the non-equivalent groups with anchor test equating design using either chain equating or post-stratification equating. The equating function is treated in a multivariate setting and the asymptotic covariance matrices of IRT observed-score kernel equating functions are derived. Equating is conducted using the two-parameter and three-parameter logistic models with simulated data and data from a standardized achievement test. The results show that IRT observed-score kernel equating offers small standard errors and low equating bias under most settings considered.
Probability Theory and Statistics
IdentifiersURN: urn:nbn:se:uu:diva-233484OAI: oai:DiVA.org:uu-233484DiVA: diva2:757287