NAEP Technical Documentation2020 Summary Comparison Tables
The purpose of the tables below is to summarize the differences in percentages across item-response categories for the 2020 NAEP assessments. For each subject's instrument, the presented statistics include the differences in item response-category percentages across all the items in a group. In some circumstances, an item may have more than one response option or prompt. The percentages presented include the minimum, maximum, average, and median difference, all of which are expressed based upon the absolute value of the difference at the item-response level.
| Assessment | Age | Number of response options/prompts | Average number of respondents in Contractor 2 database per option/prompt | Average difference in number of respondents between Contractor 2 database and Contractor 1 scored data | Difference in percentage differences at the response-category level | |||
|---|---|---|---|---|---|---|---|---|
| Minimum | Maximum | Average | Median | |||||
| Long-Term Trend Reading | 9 | 78 | 2817 | 14 | # | 0.40 | 0.13 | 0.11 |
| 13 | 95 | 2981 | 15 | # | 0.43 | 0.13 | 0.14 | |
| Long-Term Trend Mathematics | 9 | 135 | 4227 | 17 | # | 1.09 | 0.09 | 0.06 |
| 13 | 152 | 4451 | 17 | # | 0.48 | 0.06 | 0.05 | |
| # Rounds to zero. NOTE: Average difference in number of respondents is the average, across all response options, of the absolute value of the difference in the number of respondents for each response option in Contractor 1's file and the number in Contractor 2's file. Contractor 1 = The NAEP Materials Preparation, Distribution, Processing, and Scoring (MDPS) Contractor. Contractor 2 = The NAEP Design, Analysis, and Reporting Contractor. In 2020, age 17 was not assessed. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2020 Assessment. | ||||||||
| Assessment | Age | Number of response options/prompts | Average number of respondents in Contractor 2 database per option/prompt | Average difference in number of respondents between Contractor 2 database and Contractor 1 scored data | Difference in percentage differences at the response-category level | |||
|---|---|---|---|---|---|---|---|---|
| Minimum | Maximum | Average | Median | |||||
| Long-Term Trend Reading | 9 | 19 | 8458 | 171 | # | 1.19 | 0.33 | 0.27 |
| 13 | 21 | 8942 | 197 | 0.03 | 1.54 | 0.37 | 0.27 | |
| Long-Term Trend Mathematics | 9 | 17 | 8437 | 146 | # | 1.09 | 0.31 | 0.25 |
| 13 | 20 | 8885 | 178 | 0.01 | 1.45 | 0.35 | 0.28 | |
| # Rounds to zero. NOTE: Average difference in number of respondents is the average, across all response options, of the absolute value of the difference in the number of respondents for each response option in Contractor 1's file and the number in Contractor 2's file. Contractor 1 = The NAEP Materials Preparation, Distribution, Processing, and Scoring (MDPS) Contractor. Contractor 2 = The NAEP Design, Analysis, and Reporting Contractor. In 2020, age 17 was not assessed. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2020 Assessment. | ||||||||
Last updated 25 April 2024 (ML)