Table of Contents  |  Search Technical Documentation  |  References

NAEP Weighting Procedures → Weighting Procedures and Variance Estimation for the 2000 National Main Assessment → Reporting Weights Main → Initial Student Weight for the 2000 National Main Assessment → State Assessment Overlap Adjustment for the 2000 National Main Assessment

NAEP Technical DocumentationState Assessment Overlap Adjustment for the 2000 National Main Assessment

The state assessment overlap weighting factor (OVLAP_FC) applies to students in schools that participate in both the state and national main assessments. This weighting factor inflates the student weights to account for students selected for the state assessment that were intentionally excluded from the national NAEP student listing forms. The state assessment has priority over the national main assessment and selects its student sample first. Students selected for the state assessment are left off the national student listing form to avoid being included in both studies. Students in schools that did not overlap with the state assessment were assigned an OVLAP_FC value equal to 1.0.

Example: In a school with 200 fourth-graders, 60 are selected for the state assessment. This leaves 140 fourth-graders available for the national main assessment. Thus OVLAP_FC = 200/140, or 1.43 for students selected for the national main assessment in this school.

Printer-friendly Version