NAEP Analysis and Scaling - Summary Item Response Rates, Mathematics Assessment, By Item Type and Grade: 2011

NAEP Technical DocumentationSummary item response rates, mathematics 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: Grade 12 was not 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 Mathematics Assessment.
4	Number of items	110	13	37
	Average percent missing¹	3.33	3.78	6.72
	Minimum	0.43	1.11	0.67
	Maximum	33.17	11.72	39.14
	Average percent off-task²	†	0.07	0.05
	Minimum	†	0.00	0.00
	Maximum	†	0.52	0.51
	Average weighted percentage correct	60.05	51.12	41.98
8	Number of items	115	13	33
	Average percent missing¹	2.70	8.60	7.27
	Minimum	0.26	2.29	0.43
	Maximum	17.31	16.55	24.49
	Average percent off-task²	†	0.59	0.48
	Minimum	†	0.02	0.02
	Maximum	†	2.41	3.41
	Average weighted percentage correct	52.23	44.86	41.34

Last updated 24 February 2016 (GF)