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Table 5 Scale comparison across rater groups

From: Writing scale effects on raters: an exploratory study

 BinaryAnalytic
Teacher raterExpert raterDifferencesTeacher raterExpert raterDifferences
TimeM = 31, SD = 2.91M = 23.75, SD = 1.297.25M = 33.5,
SD = 7.43
M = 26.75, SD = 4.026.75
Fair average2.722.580.142.632.540.09
Exact agreement30%46.2%16.2%33.7%41.2%7.5%
Rater separation index2.371.021.355.912.073.84