HomeTDWNAEP Assessment Weighting ProceduresWeighting Procedures for the 2010 AssessmentComputation of Full-Sample Weights for the 2010 AssessmentSchool and Student Nonresponse Adjustments for the 2010 AssessmentSchool Nonresponse Weight Adjustment for the 2010 AssessmentDevelopment of Final School Nonresponse Cells for the 2010 Assessment

NAEP Technical Documentation Development of Final School Nonresponse Cells for the 2010 Assessment

Limits were placed on the magnitude of cell sizes and adjustment factors to prevent unstable nonresponse adjustments and unacceptably large nonresponse factors. All initial weighting cells with fewer than six cooperating schools or adjustment factors greater than 3.0 for the full sample weight were collapsed with suitable adjacent cells. Simultaneously, all initial weighting cells for any replicate with fewer than four cooperating schools or adjustment factors greater than the maximum of 3.0 or two times the full sample nonresponse adjustment factor were collapsed with suitable adjacent cells. Initial weighting cells were generally collapsed in reverse order of the cell structure; that is, starting at the bottom of the nesting structure and working up toward the top level of the nesting structure.

Public School Samples

For the public school samples, cells with the most similar race/ethnicity classification within a given urbanicity (urban-centric locale) stratum and census region were collapsed first. If further collapsing was required after all levels of race/ethnicity strata were collapsed, cells with the most similar urbanicity strata were combined next. Cells were never collapsed across census region.

Private School Samples

For the private school samples, cells with the most similar collapsed urbanicity strata within a given census region and affiliation were collapsed first. If further collapsing was required, census region cells within a given affiliation were collapsed. Cells were never collapsed across affiliation.

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