Skip to main content
IES    
NCES
National Center for
Education Statistics
Menu
Contact
Tools
ED.gov
Newsflash
Search IES

Table of Contents | Search Technical Documentation | References

NAEP Analysis and Scaling → Initial Activities → Classical Item Analysis → Block-Level Descriptive Statistics as Defined After Scaling, Grade 8 Meaning Vocabulary Combined National and State Assessment, by Public and Nonpublic School Sessions: 2013
NAEP Technical DocumentationBlock-level descriptive statistics as defined after scaling, grade 8 meaning vocabulary combined national and state assessment, by public and nonpublic school sessions: 2013
Statistic Type of school1 Block R14 Block R15 Block R16 Block R17 Block R18 Block R19 Embedded items

† Not applicable.
11 Nonpublic-school sample includes only private schools, including Catholic schools.
22 The Weighted proportion of students attempting last item is equal to 1 - (Percent not responding to last item /100).
NOTE: The unweighted sample associated with the embedded items is the average unweighted sample across all embedded meaning vocabulary items. The embedded items column contains information about only those meaning vocabulary items embedded within the 25-minute reading comprehension blocks.
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2013 Reading Assessment.
Number of scaled items † 6 5 5 5 6 5 24
Unweighted sample size Public 4,300 5,200 5,200 4,300 3,600 3,700 23,800
Nonpublic 100 100 100 100 100 100 500
Weighted average item score Public .54 .58 .91 .79 .74 .76 .77
Nonpublic .66 .64 .95 .85 .88 .81 .85
Weighted average polyserial Public .67 .73 1.21 .90 .81 .84 .66
Nonpublic .73 .80 1.46 1.16 .77 1.00 .67
Weighted alpha reliability Public .46 .45 .72 .57 .57 .47 †
Nonpublic .49 .56 .67 .70 .51 .64 †
Weighted proportion of students attempting last item2 Public 1.00 .99 1.00 1.00 1.00 1.00 †
Nonpublic 1.00 1.00 1.00 1.00 .96 1.00 †
Last updated 21 May 2017 (DC)
IES    
NCES
National Center for
Education Statistics
Explore the Institute of Education Sciences