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Block | Item | Range of response codes | Sample size | Percent exact agreement | Cohen's Kappa | Intraclass correlation |
---|---|---|---|---|---|---|
W3 | W006002 | 1–6 | 2,800 | 66 | † | 0.91 |
W4 | W006102 | 1–6 | 3,400 | 72 | † | 0.94 |
W5 | W006202 | 1–6 | 3,200 | 73 | † | 0.94 |
W6 | W006302 | 1–6 | 3,500 | 68 | † | 0.91 |
W7 | W006402 | 1–6 | 3,000 | 75 | † | 0.95 |
W8 | W006502 | 1–6 | 3,800 | 70 | † | 0.94 |
W11 | W006802 | 1–6 | 2,800 | 69 | † | 0.94 |
W12 | W006902 | 1–6 | 3,300 | 68 | † | 0.94 |
W13 | W007002 | 1–6 | 2,000 | 71 | † | 0.95 |
W14 | W007102 | 1–6 | 3,500 | 72 | † | 0.95 |
W16 | W007302 | 1–6 | 3,500 | 69 | † | 0.94 |
W17 | W007402 | 1–6 | 2,600 | 71 | † | 0.94 |
W20 | W007702 | 1–6 | 1,600 | 75 | † | 0.96 |
W21 | W007802 | 1–6 | 3,200 | 68 | † | 0.93 |
W22 | W007902 | 1–6 | 2,600 | 75 | † | 0.95 |
W23 | W008002 | 1–6 | 4,600 | 74 | † | 0.96 |
W24 | W008102 | 1–6 | 3,700 | 71 | † | 0.94 |
† 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. |