Table of Contents | Search Technical Documentation | References

NAEP Assessment Sample Design → NAEP 2022 Sample Design → Sample Design for the 2022 National Long-Term Trend Assessment

​​​​NAEP Technical DocumentationSample Design for the 2022 National Long-Term Trend Assessment

      

Selection of Primary Sampling Units

2022 Public School Long-Term Trend Assessment

2022 Private School Long-Term Trend Assessment

School and Student Participation Results

Unlike most NAEP assessments, the 2022 lon​g-term trend (LTT)​ assessments target students based on age rather than grade. The age populations for NAEP 2022 are as follows:

  • age 9 population: all students born in 2012 (i.e., all students who were nine years old on December 31, 2021); and
  • age 13 population: all students born in 2009 (i.e., all students who were thirteen years old on December 31, 2022​)​​.​
    ​

The NAEP 2022 sample design consisted of nationally representative samples of students for the following assessments:

  • reading at age 9; 
  • mathematics at age 9;
  • reading at age 13; and
  • mathematics at age 13.

This was accomplished by designing separate sample components for public and private schools for each age​. The selected samples were based on a three-stage sample design:

The samples of schools were selected with probability proportional to a measure of size based on the estimated age 9 or age 13 enrollment in the schools. An adjustment was made to the initial measures of size in an attempt to ensure the inclusion of all eligible schools that were part of the 2020 LTT sample for the respective age (9 or 13). The NAEP sampling procedures used an adaptation of the Keyfitz process to compute conditional measures of size that, by design, maximized the overlap of schools selected for both the 2020 and 2022 LTT​​ assessments.

The target population included all nine year old students or thirteen year old students (according to the age definitions above) in public and private schools, including Bureau of Indian Education (BIE) and Department of Defense Education Activity (DoDEA) schools located in the U.S. (but not overseas).

All LTT assessments in 2022 were paper-based assessments (PBA) administered using paper and pencil.

The sample design for the long-term trend assessments is described in more detail in subsequent pages.

Last updated 18 July 2024 (SK)