Explanatory Modeling of Language DIF Among Multilingual Learners Using the IRT-C Model

• In Event: Considerations in Assessing Special Populations

Abstract

Differential item functioning (DIF) was evaluated between English- and Spanish-speaking students on released science items from the 2011 TIMSS using the IRT-C model. Several items exhibited DIF, and covariates were modeled to explain DIF. Last, item content features were evaluated to explain any remaining DIF after modeling the covariates.

Author

• Kevin Krost, VIRGINIA POLYTECHNIC INSTITUTE AND STATE UNIVERSITY