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Impact of Differential Item Functioning on Item Model Fit Using Concurrent Equating Method
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Zeynep Uzun; Tuncay Ögretmen – Large-scale Assessments in Education, 2025
This study aimed to evaluate the item model fit by equating the forms of the PISA 2018 mathematics subtest with concurrent common items equating in samples from Türkiye, the UK, and Italy. The answers given in mathematics subtest Forms 2, 8, and 12 were used in this context. Analyzes were performed using the Dichotomous Rasch Model in the WINSTEPS…
Descriptors: Item Response Theory, Test Items, Foreign Countries, Mathematics Tests
Comparing the Score Interpretation across Modes in PISA: An Investigation of How Item Facets Affect Difficulty
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Harrison, Scott; Kroehne, Ulf; Goldhammer, Frank; Lüdtke, Oliver; Robitzsch, Alexander – Large-scale Assessments in Education, 2023
Background: Mode effects, the variations in item and scale properties attributed to the mode of test administration (paper vs. computer), have stimulated research around test equivalence and trend estimation in PISA. The PISA assessment framework provides the backbone to the interpretation of the results of the PISA test scores. However, an…
Descriptors: Scoring, Test Items, Difficulty Level, Foreign Countries