The NAEP 2008 arts sample design yielded a nationally representative sample of public school students in grade 8 through a three-stage approach: selection of primary sampling units (PSUs), selection of schools within strata, and selection of students within schools. The sample of schools was selected with probability proportional to a measure of size based on the estimated eighth-grade enrollment in the schools.
The 2008 arts sampling plan was designed to assess 2,700 eighth-graders within the NAEP public school sample.
These students were allocated between two tests. The operational tests were in music and visual arts.
As in past assessments, Black and Hispanic students were oversampled at a moderate rate. Schools in a high Black/Hispanic stratum (i.e., schools with 15 percent or more Black and Hispanic students and at least 10 percent Black or Hispanic students in the eighth grade) were sampled at twice the rate as schools not in a high Black or Hispanic stratum to implement oversampling of Black and Hispanic students.
From the stratified frame of public schools, a systematic random sample of eighth-grade schools was drawn with probability proportional to a measure of size based on the estimated eighth-grade enrollment of the school.
Each selected school in the public school sample provided a list of eligible enrolled students from which a systematic, equal probability sample of students was drawn.