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Mathematics 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 2008
Year Assessment Age 9 Age 13 Age 17
2008 Long-term trend assessment R3 R3 R3
2004 Long-term trend assessment R3 R3 R3
Long-term trend bridge study assessment R3 R3 R3
NOTE: R3 refers to accommodations offered to students with disabilities (SD) and English language learners (ELL) participating in the NAEP assessment.
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2004 and 2008 Mathematics Assessments.

Last updated 10 October 2011 (JL)