While the COVID-19 pandemic disrupted educational learning, the impacts of the pandemic may vary based on student demographics. The main purpose of this study was to determine if there were differences in student performance due to COVID-19 across several demographic variables. Multilevel mixed effects models compared the effects of COVID-19 in a…

In test equating, one critical equating property is the group invariance property which indicates that the equating function used to convert performance on each alternate form to the reporting scale should be the same for various subgroups. To mitigate the impact of disrupted learning on the item parameters during the COVID-19 pandemic, a…