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NAEP Sample Design → NAEP 2005 Sample Design → National Assessment Sample Design → Fourth- and Eighth-Grade Public School Science Assessment and Bridge Study → School and Student Participation in the 2005 National Science Assessment → Student Response Rates for National Science

NAEP Technical DocumentationStudent Response Rates for National Science

The table below presents the overall weighted student response rates and exclusion rates for the science bridge and science operational studies. The weighted response rates utilize the student base weights and indicate the weighted percentage of assessed students as a percentage of all students to be assessed. The exclusion rates give the weighted percentage of excluded SD or ELL students as a percentage of all absent, assessed, and excluded students. The response rates for the science operational study include both the results from the NAEP State and the supplemental national-only samples.

Weighted student response and exclusion rates, science and science bridge studies, by science type and grade: 2005

Science type	Fourth grade			Eighth grade
	Weighted student response rate1	Weighted percent of all students who are SD and excluded2	Weighted percent of all students who are ELL and excluded2	Weighted student response rate1	Weighted percent of all students who are SD and excluded2	Weighted percent of all students who are ELL and excluded2
Science bridge overall	93.93	3.22	1.49	90.71	2.57	1.34
National science operational	93.43	2.64	1.37	90.50	2.63	0.88
Supplemental science	90.78	1.93	0.79	90.40	2.39	0.20
State science	93.68	2.57	1.36	90.50	2.47	0.90
1 Denominator is the total eligible sample less excluded cases. 2 Denominator is the total eligible sample. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2005.

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