NAEP Technical DocumentationDevelopment of Final Student Nonresponse Cells for the 2020 Assessment

Similar to the school nonresponse adjustment, cell and adjustment factor size constraints are in place to prevent unstable nonresponse adjustments or unacceptably large adjustment factors. All initial weighting cells with either fewer than 20 participating students, or adjustment factors greater than two for the full sample weight, were collapsed with suitable adjacent cells. Simultaneously, all initial weighting cells for any replicate with either fewer than 15 participating students or an adjustment factor greater than the maximum of two or one and a half 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 Schools

For public schools, race/ethnicity cells within students with disabilities/English learners (SD/EL) status and subject, school nonresponse cell, categorized grade, and gender classes were collapsed first. If further collapsing was required, cells were next combined across gender, then categorized grade, and finally school nonresponse cells. Cells for public schools are never collapsed across SD/EL status and subject.

Private Schools

For private schools, race/ethnicity cells within school nonresponse cell, categorized grade, and gender classes were collapsed first. If further collapsing was required, cells were next combined across gender, then categorized grade, and finally school nonresponse cells.

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