ERIC Number: EJ1030020
Record Type: Journal
Publication Date: 2014
Abstractor: As Provided
Reference Count: 19
Local Observed-Score Kernel Equating
Wiberg, Marie; van der Linden, Wim J.; von Davier, Alina A.
Journal of Educational Measurement, v51 n1 p57-74 Spr 2014
Three local observed-score kernel equating methods that integrate methods from the local equating and kernel equating frameworks are proposed. The new methods were compared with their earlier counterparts with respect to such measures as bias--as defined by Lord's criterion of equity--and percent relative error. The local kernel item response theory observed-score equating method, which can be used for any of the common equating designs, had a small amount of bias, a low percent relative error, and a relatively low kernel standard error of equating, even when the accuracy of the test was reduced. The local kernel equating methods for the nonequivalent groups with anchor test generally had low bias and were quite stable against changes in the accuracy or length of the anchor test. Although all proposed methods showed small percent relative errors, the local kernel equating methods for the nonequivalent groups with anchor test design had somewhat larger standard error of equating than their kernel method counterparts.
Descriptors: Measurement Techniques, Evaluation Methods, Item Response Theory, Equated Scores, Equations (Mathematics), Evaluation Research
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Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
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