Skip Navigation
small NCES header image
NAEP Analysis and Scaling → Initial Activities → Classical Item Analysis

Classical Item Analysis

      

Dichotomously Scored Items

Polytomously Scored Items

Blocks of Items

horizontal line

All National Assessment of Educational Progress (NAEP) cognitive items are subjected to analyses of item properties. These analyses include classical item analyses and incorporate examinee sampling weights appropriately. Item analyses are performed separately for each grade on each item in each subject area. Each block of items is analyzed separately by grade, with the total score of the block (including the analyzed item) used as the criterion score for statistics requiring such a score. The 2004 and 2008 long-term trend assessment data were analyzed a bit differently. Individual items and blocks of items were analyzed by age (9, 13, and 17) rather than grade (4, 8, and 12). In cases where final weights are not available, preliminary weights are used in these preliminary analyses. The item analysis of cognitive items is repeated after scaling of the items has been completed.

Summaries of classical item statistics, main assessments, by assessment year, grade, and subject: 2000–2008
Subject Assessment Overall descriptive statistics for item blocks as defined after scaling Block-level descriptive statistics by 1public and nonpublic school sessions, as defined after scaling Average jurisdiction item scores for monitored and unmonitored sessions
Arts (Music) 2008 national main assessment at grade 8 R3
Arts (Visual Arts) 2008 national main assessment at grade 8 R3
Civics 2006 national main assessment at grade 4 R3
2006 national main assessment at grade 8 R3
2006 national main assessment at grade 12 R3
Economics 2006 national main assessment at grade 12 R3
Geography 2001 national main assessment at grade 4 R3 / R2 R3 / R2
2001 national main assessment at grade 8          R3 / R2 R3 / R2
2001 national main assessment at grade 12 R3 / R2 R3 / R2
Mathematics 2007 combined national and state main assessment at grade 4 R3 R3
2007 combined national and state main assessment at grade 8 R3 R3
2005 combined national and state main assessment at grade 4 R3 R3
2005 combined national and state main assessment at grade 8 R3 R3
2005 national main assessment at grade 12 R3 R3
2003 combined national and state main assessment at grade 4 R3 R3
2003 combined national and state main assessment at grade 8 R3 R3
2000 national main assessment at grade 4 R3 / R2 R3 / R2
2000 national main assessment at grade 8 R3 / R2 R3 / R2
2000 national main assessment at grade 12 R3 / R2 R3 / R2
2000 state assessment at grade 4 R3 / R2 R2
2000 state assessment at grade 8 R3 / R2 R2
Reading 2007 combined national and state main assessment at grade 4 R3 R3
2007 combined national and state main assessment at grade 8 R3 R3
2005 combined national and state main assessment at grade 4 R3 R3
2005 combined national and state main assessment at grade 8 R3 R3
2005 national main assessment at grade 12 R3 R3
2003 combined national and state main assessment at grade 4 R3 R3
2003 combined national and state main assessment at grade 8 R3 R3
2002 combined national and state main assessment at grade 4 R3 R3
2002 combined national and state main assessment at grade 8 R3 R3
2002 national main assessment at grade 12 R3 R3
2000 national main assessment at grade 4 R3 / R2 R3 / R2
Science 2005 combined national and state main assessment at grade 4 R3 R3
2005 combined national and state main assessment at grade 8 R3 R3
2005 national main assessment at grade 12 R3 R3
2000 national main assessment at grade 4 R3 / R2 R3 / R2
2000 national main assessment at grade 8 R3 / R2 R3 / R2
2000 national main assessment at grade 12 R3 / R2 R3 / R2
2000 state assessment at grade 4 R3 / R2 R2
2000 state assessment at grade 8 R3 / R2 R2
U.S. history 2006 national main assessment at grade 4 R3
2006 national main assessment at grade 8 R3
2006 national main assessment at grade 12 R3
2001 national main assessment at grade 4 R3 / R2 R3 / R2
2001 national main assessment at grade 8 R3 / R2 R3 / R2
2001 national main assessment at grade 12 R3 / R2 R3 / R2
Writing 2007 combined national and state main assessment at grade 8 R3 R3
2007 national main assessment at grade 12 R3
2002 combined national and state main assessment at grade 4 R3 R3
2002 combined national and state main assessment at grade 8 R3 R3
2002 national main assessment at grade 12 R3 R3
† Not applicable. Block-level descriptive statistics by public- and nonpublic-schools were only produced for national main assessment data, not for state assessment data. Average jurisdiction item scores for monitored and unmonitored tables are not applicable to the national main assessment, because only state assessment sessions were monitored. These sessions were monitored, because the assessment administrators were not NAEP staff; rather, they were individuals from each state hired on a contract basis to administer the assessment. After 2000, all NAEP assessments have been administered by NAEP staff only and therefore required no monitoring.
‡ Reporting standards not met. Public and nonpublic school participation rates were not met for 2006 U.S. history, economics, civics, 2007 writing at grade 12, and 2008 arts (music and visual arts).
1Nonpublic school samples include only Private and Catholic schools.
NOTE: The 2006 economics assessment was conducted at grade 12 only, and the 2008 arts (music and visual arts) assessment was conducted at grade 8 only. The links labeled "R2" link to data for the R2 reporting population. The links labeled "R3" link to data for the R3 reporting population. The R3 sample is the accommodated reporting sample; it samples students who are classified as students with disabilities (SD) or English language learners (ELL) plus SD/ELL students from sessions in which accommodations were allowed. The R3 sample is the only sample type used after 2001. 
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2000–2008 Assessments.
Summaries of classical item statistics, long-term trend assessments, by assessment year, grade, and subject: 2004 and 2008
Subject Assessment year and age Overall descriptive statistics for item blocks as defined after scaling
Mathematics 2008 long-term trend assessment at age 9 R3
2008 long-term trend assessment at age 13 R3
2008 long-term trend assessment at age 17 R3
Reading 2008 long-term trend assessment at age 9 R3
2008 long-term trend assessment at age 13 R3
2008 long-term trend assessment at age 17 R3
Mathematics 2004 long-term trend assessment at age 9 R3
2004 long-term trend assessment at age 13 R3
2004 long-term trend assessment at age 17 R3
Reading 2004 long-term trend assessment at age 9 R3
2004 long-term trend assessment at age 13 R3
2004 long-term trend assessment at age 17 R3
NOTE: "Block-level descriptive statistics by public- and nonpublic-schools" tables and "Average jurisdiction item scores for monitored and unmonitored" tables are not produced for long-term trend assessments. These two types of tables were only produced for main assessment data. Table cells containing the term "R3" link to tables for the R3 reporting population. The R3 sample is the accommodated reporting sample; it samples students who are classified as students with disabilities (SD) or English language learners (ELL) plus SD/ELL students from sessions in which accommodations were allowed. The R3 sample is the only sample type used after 2001.
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2004 and 2008 Long-Term Trend Assessments.

Last updated 14 December 2011 (GF)
Would you like to help us improve our products and website by taking a short survey?

YES, I would like to take the survey

or

No Thanks

The survey consists of a few short questions and takes less than one minute to complete.
National Center for Education Statistics - http://nces.ed.gov
U.S. Department of Education