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

NAEP Technical DocumentationSummary item response rates, reading 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 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 Reading Assessment.
4	Number of items	64	6	30
	Average percent missing¹	6.91	14.49	12.02
	Minimum	0.36	1.22	2.87
	Maximum	24.60	26.62	29.29
	Average percent off-task²	†	0.23	0.28
	Minimum	†	0.07	0.09
	Maximum	†	0.62	0.62
	Average weighted percentage correct	62.27	60.82	44.03
8	Number of items	76	11	43
	Average percent missing¹	1.79	4.45	6.68
	Minimum	0.14	0.69	0.77
	Maximum	9.18	12.73	26.63
	Average percent off-task²	†	0.21	0.29
	Minimum	†	0.08	0.08
	Maximum	†	0.43	0.76
	Average weighted percentage correct	73.31	65.55	51.91

Last updated 06 January 2016 (GF)