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Comparisons of the Kernel Equating Method With the Traditional Equating Methods on Praxis Data KE OSE NEAT

Mao, Xia; von Davier, Alina A.; Rupp, Stacie L.
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ETS Research Report
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Subject/Key Words:
Kernel Equating (KE), Observed-Score Equating (OSE), Non-Equivalent-Groups Anchor Test (NEAT) Design, Praxis Series


We compared KE with the equating methods that were used operationally. The results showed that the differences between KE and the traditional equating methods are very small in the EG design, especially in the linear case. In the two NEAT designs, the KE version of poststratification equating with optimal bandwidths produced close results to its analogue, frequency estimation equipercentile equating, except at the lower score range. The KE linear method yielded very similar results to the Tucker method.

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