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NAEP Analysis and Scaling → Initial Activities → Constructed-Response Interrater Reliability → Range of Response Codes, Percentage Exact Agreement, and Intraclass Correlation for the Constructed-Response Items Used in Scaling, by Block and Item, Grade 12 Writing National Main Assessment: 2002
Range of response codes, percentage exact agreement, and intraclass correlation for the constructed-response items used in scaling, by block and item, grade 12 writing national main assessment: 2002
Block Item Range of response codes Sample size Percent exact agreement Cohen's Kappa Intraclass correlation
W3 W008302 1–6 1,500 51 0.61
W008402 1–6 1,500 70 0.86
W6 W008602 1–6 3,000 66 0.87
W7 W008702 1–6 1,200 74 0.93
W9 W008902 1–6 2,100 71 0.88
W11 W009102 1–6 2,000 72 0.92
W12 W009202 1–6 1,600 60 0.87
W13 W009302 1–6 2,000 68 0.93
W14 W009402 1–6 3,200 64 0.89
W15 W009502 1–6 3,300 70 0.89
W17 W009702 1–6 3,100 69 0.91
W18 W009802 1–6 1,900 72 0.94
W19 W009902 1–6 2,300 74 0.94
W20 W010002 1–6 1,400 65 0.89
W22 W010202 1–6 3,100 72 0.92
W23 W010302 1–6 1,500 71 0.93
W24 W010402 1–6 2,600 67 0.91
† The intraclass correlation is not reported for dichotomously scored items; Cohen's Kappa is not reported for polytomously scored items.
NOTE: Cohen's Kappa is a measure of reliability that is appropriate for items that are dichotomously scored. The intraclass correlation coefficient is most appropriate for items with more than two categories.
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2002 Writing Assessment.

Last updated 26 March 2009 (GF)

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