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NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Assessment IRT Parameters → IRT Parameters for the Mathematics Long-Term Trend Assessments

NAEP TECHNICAL DOCUMENTATIONMathematics Long-Term Trend Assessment IRT Parameters

The links provided below contain Item Response Theory (IRT) parameters for NAEP mathematics long-term trend items that were scaled, as well as the block in which each item appears for each age group and the position of each item within its block. Note that these item parameters are provided in the metrics used for the original univariate scale.

Links to mathematics long-term trend IRT parameters for 2004, 2008 and 2012
Year	Assessment	Age 9	Age 13	Age 17
2012	Long-term trend assessment	R3	R3	R3
2008	Long-term trend assessment	R3	R3	R3
2004	Long-term trend assessment	R3	R3	R3
2004	Long-term trend bridge study assessment	R2	R2	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 language learners (ELL), 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/ELL 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 R2 sample was used as the bridge sample type in 2004 bridge studies to allow for comparisons with prior long-term trend assessments. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2004, 2008 and 2012 Mathematics Long-Term Trend Assessments.

Last updated 06 August 2020 (DS)

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