NotesFAQContact Us
Collection
Advanced
Search Tips
Showing all 2 results Save | Export
Peer reviewed Peer reviewed
Direct linkDirect link
Tijmstra, Jesper; Bolsinova, Maria; Liaw, Yuan-Ling; Rutkowski, Leslie; Rutkowski, David – Journal of Educational Measurement, 2020
Although the root-mean squared deviation (RMSD) is a popular statistical measure for evaluating country-specific item-level misfit (i.e., differential item functioning [DIF]) in international large-scale assessment, this paper shows that its sensitivity to detect misfit may depend strongly on the proficiency distribution of the considered…
Descriptors: Test Items, Goodness of Fit, Probability, Accuracy
Peer reviewed Peer reviewed
Direct linkDirect link
Wyse, Adam E.; Mapuranga, Raymond – International Journal of Testing, 2009
Differential item functioning (DIF) analysis is a statistical technique used for ensuring the equity and fairness of educational assessments. This study formulates a new DIF analysis method using the information similarity index (ISI). ISI compares item information functions when data fits the Rasch model. Through simulations and an international…
Descriptors: Test Bias, Evaluation Methods, Test Items, Educational Assessment