Impact of Group Variability on Rasch Equating under the Random Groups Design

• In Event: Electronic Board Session I

Abstract

Group equivalence is assumed when performing random groups equating. However, in practice, proficiencies for examinees taking different forms may not be equivalent if random assignment or form spiraling doesn’t work well. In this study, we will investigate the impact of various differences in group proficiencies on Rasch true-score equating.

Authors

• Chunyan Liu, NATIONAL BOARD OF MEDICAL EXAMINERS

• Michael Kolen, The University of Iowa

• Raja G Subhiyah, NATIONAL BOARD OF MEDICAL EXAMINERS