HomeTDWNAEP Analysis and ScalingInitial ActivitiesSummaries of Item-Level Response Rates for NAEP AssessmentsSummary Response Rates for the NAEP 2008 Arts (Music) Assessment

NAEP Technical DocumentationSummary Response Rates for the NAEP 2008 Arts (Music) Assessment

Summary item response rates, arts (music) assessment, by item type and grade: 2008

Grade	Statistic	Multiple-choice items	Dichotomous constructed-response items	Polytomous constructed-response items
† Not applicable. 1 Missing responses include the categories "omitted" and "not reached." 2 An "off-task" response (constructed-response items only) is a response that is unrelated to the question. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2010 Arts (Music) Assessment.
8	Number of items	48.00	12.00	49.00
	Average percent missing1	2.99	14.50	11.44
	Minimum	0.24	1.61	0.24
	Maximum	12.58	52.81	64.97
	Average percent off-task2	†	2.84	0.99
	Minimum	†	0.32	0.12
	Maximum	†	13.91	3.99
	Average weighted proportion correct	57.51	40.13	34.44

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