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Table of Contents | Search Technical Documentation | References
NAEP Analysis and Scaling → Estimation of Population and Student Group Distributions → Examining the Population-Structure Models Used in NAEP → Proportion of Scale Score Variance Accounted for by the Population-Structure Models → Proportion of Scale Score Variance Accounted for by the Population-Structure Model, Reading Combined National and State Assessments, by Subscale and Grade: 2017
NAEP Technical DocumentationProportion of Scale Score Variance Accounted for by the Population-Structure Model, Reading Combined National and State Assessments, by Subscale and Grade: 2017
| Grade | Number of initial conditioning contrasts2 | Number of principal components2 | Proportion of scale score variance1 | |
|---|---|---|---|---|
| Reading for literary experience | Reading for information | |||
| 4 | 2075 | 739 | .62 | .66 |
| 8 | 2359 | 798 | .58 | .62 |
|
1 (Total Variance – Residual Variance) / Total Variance, where Total Variance consists of sampling, measurement, and other sources of error. 2 Excluding the constant term. NOTE: In 2017, grade 12 was not assessed. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2017 Reading Assessments. | ||||
Last updated 11 May 2022 (SK)