NAEP Technical DocumentationReading Assessment IRT Parameters

The table links provided below contain Item Response Theory (IRT) parameters for NAEP reading items that were scaled, as well as the block in which each item appeared for each grade (shown in the Block column) and the position of each item within its block (shown in the Item column). Note that these item parameters are provided in the metrics used for the original calibration of the scales.

Links to reading item response theory (IRT) parameters tables, by scale, year, and assessment: Various years, 2000–2017

Year	Assessment	Reading for information subscale	Reading for literary experience subscale	Reading to perform a task subscale	Vocabulary1
2017	Combined national and state assessments grade 4	R3	R3	†	†
	Combined national and state assessments grade 8	R3	R3	†	†
2015	Combined national and state assessments grade 4	R3	R3	†	R3
	Combined national and state assessments grade 8	R3	R3	†	R3
	National assessment grade 12	R3	R3	†	R3
2013	Combined national and state assessments grade 4	R3	R3	†	R3
	Combined national and state assessments grade 8	R3	R3	†	R3
	Combined national and state assessments grade 12	R3	R3	†	R3
2011	Combined national and state assessments grade 4	R3	R3	†	R3
	Combined national and state assessments grade 8	R3	R3	†	R3
2009	Combined national and state assessments grade 4	R3	R3	†	R3
	Combined national and state assessments grade 8	R3	R3	†	R3
	Combined national and state assessments grade 12	R3	R3	†	R3
2007	Combined national and state assessments grade 4	R3	R3	†	†
	Combined national and state assessments grade 8	R3	R3	R3	†
2005	Combined national and state assessments grade 4	R3	R3	†	†
	Combined national and state assessments grade 8	R3	R3	R3	†
	Combined national and state assessments grade 12	R3	R3	R3	†
2003	Combined national and state assessments grade 4	R3	R3	†	†
	Combined national and state assessments grade 8	R3	R3	R3	†
2002	Combined national and state assessments grade 4	R3	R3	†	†
	Combined national and state assessments grade 8	R3	R3	R3	†
	National assessment grade 12	R3	R3	R3	†
2000	National main assessment grade 4	R3 / R2	R3 / R2	†	†
† Not applicable. 1 Single overall scale. Vocabulary, reading vocabulary, and meaning vocabulary refer to the same reporting scale. NOTE: R2 is the non-accommodated reporting sample; R3 is the accommodated reporting sample. If sampled students are classified as students with disabilities (SD) or English learners (EL), and school officials, using NAEP guidelines, determine that they can meaningfully participate in the NAEP assessment with accommodation, those students are included in the NAEP assessment with accommodation along with other sampled students including SD/EL students who do not need accommodations. The R3 sample is more inclusive than the R2 sample type and excludes a smaller proportion of sampled students. The R3 sample is the only reporting sample used in NAEP after 2001.  SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), various years, 2000–2017 Reading Assessments.

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