The purpose of this study was to compare the equating errors item and ability parameters obtained by performing scale transformation methods two multidimensional test forms under various conditions. Sample size (1000-2000), common ratio (20% 40%), correlation between dimensions (0.1-0.5-0.9) parameter estimation model (2PLM-3PLM) were taken as research Equating error (RMSE) used examine accurac...

The R package equate (Albano, 2010) contains functions for non-IRT equating under random groups and nonequivalent groups designs. This package vignette introduces these designs and provides an overview of statistical equating with details about each of the supported equating methods. Examples demonstrate the basic functionality of the package.

BACKGROUND The MRCP(UK) exam, in 2008 and 2010, changed the standard-setting of its Part 1 and Part 2 examinations from a hybrid Angoff/Hofstee method to statistical equating using Item Response Theory, the reference group being UK graduates. The present paper considers the implementation of the change, the question of whether the pass rate increased amongst non-UK candidates, any possible role...