Yu-Mi Lee

Diagnosis on the Performance of the Delta Method for Estimating Standard Errors of IRT Equating Under the Common-Item Design

The purpose of the present study is to use computer simulations to examine the performance of the delta method formulas for estimating standard errors (SEs) of item response theory (IRT) true score and observed score equating that have been presented under the common-item design. Test type (3PL model test, 3PL+GPC mode...