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.
|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.