NAEP Technical DocumentationGeography Assessment IRT Parameters

The tables for which links are provided below contain Item response theory (IRT) parameters for NAEP geography items that were scaled, as well as the block in which each item appears for each grade (Block) and the position of each item within its block (Item). Note that these item parameters are provided in the metrics used for the original calibration of the scales.

Links to item response theory (IRT) parameters, geography national assessments, by year, grade, and subscale: Various years, 2001‒2018

Year	Grade	Space and place subscale	Environment and society subscale	Spatial dynamics and connections subscale
2018	8	R3	R3	R3
2014	8	R3	R3	R3
2010	4	R3	R3	R3
	8	R3	R3	R3
	12	R3	R3	R3
2001	4	R3 / R2	R3 / R2	R3 / R2
	8	R3 / R2	R3 / R2	R3 / R2
	12	R3 / R2	R3 / R2	R3 / R2
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. The block naming conventions used in the 2018 geography assessment are described in the document 2018 Block Naming Conventions in Data Products and TDW. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), various years, 2001‒2018 Geography Assessments.

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