Table of Contents | Search Technical Documentation | References
Statistics | Multiple-choice items | Dichotomous constructed-response items | Polytomous constructed-response items |
---|---|---|---|
Number of items | 35 | 25 | 21 |
Average percentage missing1 | 9.16 | 11.68 | 16.38 |
Minimum percentage missing1 | 1.12 | 2.13 | 2.50 |
Maximum percentage missing1 | 24.70 | 35.63 | 29.93 |
Average percentage off-task2 | † | 0.11 | 0.08 |
Minimum percentage off-task2 | † | 0 | 0 |
Maximum percentage off-task2 | † | 0.63 | 0.25 |
Average weighted proportion correct | 65.03 | 51.41 | 43.03 |
† Not applicable. 1 Missing includes the categories "omitted" and "not-reached." 2 "Off-task" (constructed-response items only) is a response that is unrelated to the question and considered inappropriate. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2000 Reading Assessment. |