Proportion of Scale Score Variance Accounted for by the Population-Structure Model, U.S. History National Assessment, by Subscale and Grade: 2014

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: 2014

NAEP Technical DocumentationProportion of scale score variance accounted for by the population-structure model, U.S. history national assessment, by subscale and grade: 2014
Grade	Number of initial conditioning contrasts²	Number of principal components²	Proportion¹ of scale score variance
Grade	Number of initial conditioning contrasts²	Number of principal components²	Democracy	Culture	Technology	World role
¹(Total Variance – Residual Variance)/Total Variance, where Total Variance consists of sampling, measurement, and other sources of error. ² Excluding the contant term. NOTE: In 2014, grades 4 and 12 were not assessed. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2014 U.S. History Assessment.
8	2180	432	.69	.67	.68	.77

Last updated 30 August 2021 (ML)