Table of Contents | Search Technical Documentation | References
Statistic | Item type | All items |
---|---|---|
Number of scaled items | Total | 20 |
Multiple choice | 0 | |
Dichotomously scored constructed response | 0 | |
Polytomously scored constructed response | 20 | |
Unweighted sample size | † | 144,200 |
Weighted average item score | † | 0.52 |
Weighted average polyserial | † | 0.90 |
Weighted alpha reliability | † | — |
† Not applicable. — In NAEP writing assessments, each block contains only one item — a writing prompt to which students respond with a polytomously scored constructed response; therefore, the weighted alpha reliability estimate is not meaningful. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2002 Writing Assessment. |