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7 Kunnan, A. J., "Test fairness, test bias, DIF" 4 (4): 109-112, 2007
8 Takala, S., "Test fairness : A DIF analysis of an L2 vocabulary test" 17 : 323-340, 2000
9 Hale, G. A., "Student major field and text content : Interactive effects on reading comprehension in the Test of English as a Foreign Language" 5 : 49-61, 1988
10 Cohen, J., "Statistical power analysis for the behavioral sciences" Lawrence Erlbaum Associates 1988
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