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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, U.S. History National Assessment, by Subscale and Grade: 2022
NAEP Technical DocumentationProportion of Scale Score Variance Accounted for by the Population-Structure Model, U.S. History National Assessment, by Subscale and Grade: 2022
| Grade | Number of initial conditioning contrasts | Number of principal components and contrast-coded direct covariates | Proportion of scale score variance | |||
|---|---|---|---|---|---|---|
| Democracy | Culture | Technology | World role | |||
| (Total Variance – Residual Variance) / Total Variance, where Total Variance includes variance accounted and unaccounted for by the variables in the population-structure model. | ||||||
| Excluding the constant term. | ||||||
| In 2022, grades 4 and 12 were not assessed. | ||||||
| U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2022 U.S. History Assessment. | ||||||
| 8 | 2670 | 630 | .72 | .70 | .71 | .72 |
Last updated 24 July 2024 (SK)