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NAEP Analysis and Scaling → Initial Activities → Summaries of Item-Level Response Rates for NAEP Assessments → Summary Item Response Rates, Science Assessment, By Item Type and Grade: 2011
| Grade | Statistic | Multiple-choice items | Dichotomous constructed-response items | Polytomous constructed-response items |
|---|---|---|---|---|
† Not applicable.
1 Missing responses includes the categories "omitted" and "not-reached." 2 An "off-task" response (constructed-response items only) is a response that is unrelated to the question and is considered inappropriate. NOTE: Only grade 8 was assessed in 2011. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2011 Science Assessment. |
||||
| 8 | Number of items | 98 | 1 | 50 |
| Average percent missing1 | 4.77 | 6.50 | 8.45 | |
| Minimum | 0.25 | 6.50 | 1.00 | |
| Maximum | 26.00 | 6.50 | 34.41 | |
| Average percent off-task2 | † | 0.95 | 0.54 | |
| Minimum | † | 0.95 | 0.00 | |
| Maximum | † | 0.95 | 2.23 | |
| Average weighted percentage correct | 52.54 | 55.58 | 32.12 | |
Last updated 06 January 2016 (GF)