NAEP Analysis and Scaling - Conditional Correlations and Variances of the Subscales, by Grade, Science National Main Assessment (Accommodations Not Permitted [R2]): 2000

NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Scales → Correlations Among NAEP Subject Area Subscales → Conditional Correlations and Variances of the Subscales, by Grade, Science National Main Assessment (Accommodations Not Permitted [R2]): 2000

Conditional correlations and variances of the subscales, by grade, science national main assessment (accommodations not permitted [R2]): 2000
Grade	Scale	Physical science	Earth science	Life science
4	Physical science	§	§	§
	Earth science	0.84	§	§
	Life science	0.91	0.81	§
	Residual variance	0.40	0.45	0.42
8	Physical science	§	§	§
	Earth science	0.88	§	§
	Life science	0.85	0.89	§
	Residual variance	0.35	0.40	0.35
12	Physical science	§	§	§
	Earth science	0.83	§	§
	Life science	0.90	0.86	§
	Residual variance	0.32	0.32	0.29
§This is a lower triangular symmetrical table. NOTE: Values in the table are estimates conditioned on the set of principal components included in the models used to estimate group score distributions. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2000 Science Assessment.