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NAEP Analysis and Scaling → Initial Activities → Classical Item Analysis

Classical Item Analysis

      

Dichotomously Scored Items

Polytomously Scored Items

Blocks of Items

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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 long-term trend assessment data are analyzed a bit differently. Individual items and blocks of items are analyzed by age (9, 13, and 17) rather than grade (4, 8, and 12).  The item analysis of cognitive items is repeated after scaling of the items has been completed.

Links to summaries of classical item statistics, by assessment year, grade, and subject: Various years, 2000–2012
Subject Assessment year and grade Overall descriptive statistics for item blocks as defined after scaling Block-level descriptive statistics by public and nonpublic school sessions, as defined after scaling Average jurisdiction item scores for monitored and unmonitored sessions
Arts - Music 2008 national assessment at grade 8 R3
Arts - Visual 2008 national assessment at grade 8 R3
Civics 2010 national assessment at grade 4 R3 R3
2010 national assessment at grade 8 R3 R3
2010 national assessment at grade 12 R3 R3
2006 national assessment at grade 4 R3
2006 national assessment at grade 8 R3
2006 national assessment at grade 12 R3
Economics 2012 national assessment at grade 12 R3
2006 national assessment at grade 4
2006 national assessment at grade 8
2006 national assessment at grade 12 R3
Geography 2010 national assessment at grade 4 R3 R3
2010 national assessment at grade 8 R3 R3
2010 national assessment at grade 12 R3 R3
2001 national assessment at grade 4 R3 / R2 R3 / R2
2001 national assessment at grade 8 R3 / R2 R3 / R2
2001 national assessment at grade 12 R3 / R2 R3 / R2
Mathematics 2011 combined national and state assessment at grade 4 R3 R3
2011 combined national and state assessment at grade 8 R3 R3
2009 combined national and state assessment at grade 4 R3 R3
2009 combined national and state assessment at grade 8 R3 R3
2009 combined national and state assessment at grade 12 R3 R3
2007 combined national and state assessment at grade 4 R3 R3
2007 combined national and state assessment at grade 8 R3 R3
2005 combined national and state assessment at grade 4 R3 R3
2005 combined national and state assessment at grade 8 R3 R3
2005 national assessment at grade 12 R3 R3
2003 combined national and state assessment at grade 4 R3 R3
2003 combined national and state assessment at grade 8 R3 R3
2000 national assessment at grade 4 R3 / R2 R3 / R2
2000 national assessment at grade 8 R3 / R2 R3 / R2
2000 national 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 2011 combined national and state assessment at grade 4 R3 R3
2011 combined national and state assessment at grade 8 R3 R3
2009 combined national and state assessment at grade 4 R3 R3
2009 combined national and state assessment at grade 8 R3 R3
2009 combined national and state assessment at grade 12 R3 R3
2007 combined national and state assessment at grade 4 R3 R3
2007 combined national and state assessment at grade 8 R3 R3
2005 combined national and state assessment at grade 4 R3 R3
2005 combined national and state assessment at grade 8 R3 R3
2005 national assessment at grade 12 R3 R3
2003 combined national and state assessment at grade 4 R3 R3
2003 combined national and state assessment at grade 8 R3 R3
2002 combined national and state assessment at grade 4 R3 R3
2002 combined national and state assessment at grade 8 R3 R3
2002 national assessment at grade 12 R3 R3
2000 national assessment at grade 4 R3 / R2 R3 / R2
Reading vocabulary 2011 combined national and state assessment at grade 4 R3 R3
2011 combined national and state assessment at grade 8 R3 R3
2009 combined national and state assessment at grade 4 R3 R3
2009 combined national and state assessment at grade 8 R3 R3
2009 combined national and state assessment at grade 12 R3 R3
Science 2011 combined national and state assessment at grade 8 R3 R3
2009 combined national and state assessment at grade 4 R3 R3
2009 combined national and state assessment at grade 8 R3 R3
2009 combined national and state assessment at grade 12 R3 R3
2005 combined national and state assessment at grade 4 R3 R3
2005 combined national and state assessment at grade 8 R3 R3
2005 national assessment at grade 12 R3 R3
2000 national assessment at grade 4 R3 / R2 R3 / R2
2000 national assessment at grade 8 R3 / R2 R3 / R2
2000 national 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 2010 national assessment at grade 4 R3 R3
2010 national assessment at grade 8 R3 R3
2010 national assessment at grade 12 R3 R3
2006 national assessment at grade 4 R3
2006 national assessment at grade 8 R3
2006 national assessment at grade 12 R3
2001 national assessment at grade 4 R3 / R2 R3 / R2
2001 national assessment at grade 8 R3 / R2 R3 / R2
2001 national assessment at grade 12 R3 / R2 R3 / R2
Writing 2011 combined national and state assessment at grade 8 R3 R3
2011 national assessment at grade 12 R3 R3
2007 combined national and state assessment at grade 8 R3 R3
2007 national assessment at grade 12 R3
2002 combined national and state assessment at grade 4 R3 R3
2002 combined national and state assessment at grade 8 R3 R3
2002 national assessment at grade 12 R3 R3
† Not applicable. Block-level descriptive statistics by public- and nonpublic-schools were only produced for national assessment data, not for state assessment data. Average jurisdiction item scores for monitored and unmonitored tables are not applicable to the national 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. The economics assessment was not performed in 2006 for grades four and eight. The arts assessment was conducted only at grade 8 in 2008.
‡ Reporting standards not met. Public and non-public school participation rates were not met for 2006 U.S. history, economics, civics, and 2007 writing at grade 12.
NOTE: R2 is the non-accommodated reporting sample; R3 is the accommodated reporting sample. It samples students who are classified students with disabilities (SD) or English language learners (ELL), plus SD/ELL students from sessions in which accommodations were allowed. The R3 sample is more inclusive and excludes a smaller proportion of sampled students. The R3 sample type was the only sample type used in NAEP after 2001.

 

Links to summaries of classical item statistics, long-term trend assessments, by assessment year, age, and subject: 2004, 2008, and 2012
Subject Assessment year and age Overall descriptive statistics for item blocks as defined after scaling
Mathematics 2012 long-term trend assessment at age 9 R3
2012 long-term trend assessment at age 13 R3
2012 long-term trend assessment at age 17 R3
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
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 2012 long-term trend assessment at age 9 R3
2012 long-term trend assessment at age 13 R3
2012 long-term trend assessment at age 17 R3
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
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. R2 is the non-accommodated reporting sample; R3 is the accommodated reporting sample. It samples students who are classified students with disabilities (SD) or English language learners (ELL), plus SD/ELL students from sessions in which accommodations were allowed. The R3 sample is more inclusive and excludes a smaller proportion of sampled students. The R3 sample type was the only sample type used in NAEP after 2001.

Last updated 24 February 2016 (GF)