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Block | Item | Range of response codes | Sample size | Percent exact agreement | Intraclass correlation |
---|---|---|---|---|---|
R21 | N021203 | 1–5 | 600 | 76 | 0.89 |
N023802 | 1–4 | 600 | 80 | 0.81 | |
R23 | N021803 | 1–4 | 600 | 88 | 0.89 |
R24 | N022103 | 1–4 | 600 | 79 | 0.81 |
R25 | N022405 | 1–4 | 600 | 89 | 0.85 |
R28 | N027302 | 1–5 | 600 | 79 | 0.83 |
R29 | N027602 | 1–4 | 600 | 81 | 0.75 |
NOTE: 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), 2004 Reading Long-Term Trend Assessment. |