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Table of Contents | Search Technical Documentation | References
NAEP Technical DocumentationNumber of Items by Severity of Differential Item Functioning in the Meaning Vocabulary Assessment
For dichotomously-scored items, NAEP categorizes each item into one of three categories: "A" (items exhibiting no DIF), "B" (items exhibiting a weak indication of DIF), or "C" (items exhibiting a strong indication of DIF). A plus sign (+) indicates that items are differentially easier for the focal group (female, Black, or Hispanic students) than for the reference group (male or White students) after making an adjustment for the overall level of proficiency in the two groups; a minus sign (-) indicates that items are differentially more difficult for the focal group than for the reference group. After reviewing "C" items, subject area specialists decided that no items were biased, so none were deleted from the meaning vocabulary scale for this reason.
| Grade | DIF category | Female/Male | Black/White | Hispanic/White |
|---|---|---|---|---|
| NOTE: This includes all items in the assessment (the prescaling decisions). The meaning vocabulary assessment includes multiple-choice items only. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2013 Reading Assessment. | ||||
| 4 | C- | 0 | 0 | 1 |
| B- | 0 | 2 | 1 | |
| A | 40 | 38 | 38 | |
| B+ | 0 | 0 | 0 | |
| C+ | 0 | 0 | 0 | |
| 8 | C- | 1 | 0 | 3 |
| B- | 6 | 2 | 7 | |
| A | 47 | 54 | 46 | |
| B+ | 0 | 0 | 0 | |
| C+ | 2 | 0 | 0 | |
| 12 | C- | 4 | 2 | 2 |
| B- | 4 | 4 | 8 | |
| A | 40 | 41 | 38 | |
| B+ | 0 | 1 | 0 | |
| C+ | 0 | 0 | 0 | |
Last updated 21 May 2017 (DC)