Differential Item Functioning

Differential Item Functioning

In "Establishing equivalence between scaled measures of quality of life," J. Quality of Life Research, 1996, 5, 20-26, R. Gonin, D. Cella, and S. Lloyd used item measures and standard errors from different samples to compute standardized differences. The resulting plot shows which inter-sample disagreements about item difficulties merit further investigation. This method was also proposed by Altman DG, Bland JM (1983), "Measurement in Medicine: The analysis of method comparison studies." The Statistician 32: 307-317.

Differential Item Functioning. 2001. Gonin R., Cella D., Lloyd S. … 15:3 p. 838

Differential Item Functioning Gonin R., Cella D., Lloyd S. … Rasch Measurement Transactions, 2001, 15:3 p. 838

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