This study examined group differences in online reading comprehension (ORC) using student data from the 2016 administration of the Progress in International Reading Literacy Study (ePIRLS). An explanatory item response modeling approach was used to explore the effects of item properties (i.e., item format, text complexity, and cognitive…

The "optimism hypothesis" claims that immigrant students do better in the Norwegian education system than their socioeconomic status would suggest, due to the strong educational aspirations that immigrant parents might have for their children. Grounded in an educational equity paradigm, this study aims to test this hypothesis by…

Differential item functioning (DIF) assessment is key in score validation. When DIF is present scores may not accurately reflect the construct of interest for some groups of examinees, leading to incorrect conclusions from the scores. Given rising immigration, and the increased reliance of educational policymakers on cross-national assessments…