NAEP Analysis and Scaling - Summary Item Response Rates, Reading Long-Term Trend Assessment, By Item Type and Age: 2012

NAEP Analysis and Scaling → Initial Activities → Summaries of Item-Level Response Rates for NAEP Assessments → Summary Item Response Rates, Reading Long-Term Trend Assessment, By Item Type and Age: 2012

NAEP Technical DocumentationSummary item response rates, reading long-term trend assessment, by item type and age: 2012
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), 2012 Reading Long-Term Trend Assessment.
9	Number of items	84	0	4
	Average percent missing¹	3.33	†	5.36
	Minimum	0.48	†	3.32
	Maximum	15.83	†	7.07
	Average percent off-task²	†	†	0.82
	Minimum	†	†	0.53
	Maximum	†	†	1.47
	Average weighted percentage correct	66.06	†	35.74
13	Number of items	99	0	7
	Average percent missing¹	2.61	†	3.83
	Minimum	0.19	†	2.13
	Maximum	12.95	†	5.50
	Average percent off-task²	†	†	0.27
	Minimum	†	†	0.05
	Maximum	†	†	0.57
	Average weighted percentage correct	77.27	†	53.96
17	Number of items	95	0	8
	Average percent missing¹	1.97	†	4.55
	Minimum	0.22	†	1.85
	Maximum	11.81	†	10.93
	Average percent off-task²	†	†	0.45
	Minimum	†	†	0.21
	Maximum	†	†	1.02
	Average weighted percentage correct	78.24	†	59.30

Last updated 13 November 2013 (JL)