NAEP Analysis and Scaling → Initial Activities → Summaries of Item-Level Response Rates for NAEP Assessments → Summary Response Rates for the NAEP 2008 Reading Long-Term Trend Combined National and State Main Assessments

NAEP Technical DocumentationSummary Response Rates for the NAEP 2008 Reading Long-Term Trend Assessment

Summary item response rates, by item type and age, reading LTT assessment: 2008
Age 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.
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2008  Reading Long-term Trend Assessment.
9 Number of items 84.00 † 4.00
Average percent missing1 2.87 † 6.15
Minimum 0.37 † 3.70
Maximum 14.41 † 9.71
Average percent off-task2 † † 1.17
Minimum † † 0.72
Maximum † † 1.60
Average weighted proportion correct 65.40 † 36.21
13 Number of items 100.00 † 7.00
Average percent missing1 2.42 † 3.53
Minimum 0.09 † 1.90
Maximum 11.62 † 5.52
Average percent off-task2 † † 0.29
Minimum † † 0.09
Maximum † † 0.50
Average weighted proportion correct 75.48 † 53.55
17 Number of items 96.00 † 8.00
Average percent missing1 2.19 † 6.08
Minimum 0.32 † 3.34
Maximum 14.62 † 13.32
Average percent off-task2 † † 0.60
Minimum † † 0.14
Maximum † † 1.09
Average weighted proportion correct 78.26 † 56.10
Last updated 27 October 2011 (GF)