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Table 2 Inter-item correlation matrix

From: Examining consistency among different rubrics for assessing writing

   CAE CPE GRE iBT
Rater 1 IELTS .39 .23 .33 .46
Rater 2 IELTS .48 .43 .47 .50
Rater 3 IELTS .31 .38 .32 .48
Rater 4 IELTS .53 .48 .50 .11