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Direct linkPenfield, Randall D.; Alvarez, Karina; Lee, Okhee – Applied Measurement in Education, 2009
The assessment of differential item functioning (DIF) in polytomous items addresses between-group differences in measurement properties at the item level, but typically does not inform which score levels may be involved in the DIF effect. The framework of differential step functioning (DSF) addresses this issue by examining between-group…
Descriptors: Test Bias, Classification, Test Items, Criteria
