1. NAEPirtparams::adjustments
    NAEP IRT item adjustments.
    csv| xlsx| json| ndjson| rda| rds
    data.frame|966 x 10
  2. NAEPirtparams::parameters
    NAEP IRT parameters.
    csv| xlsx| json| ndjson| rda| rds
    data.frame|19734 x 17
  3. NAEPirtparams::transformations
    NAEP transformation constants.
    csv| xlsx| json| ndjson| rda| rds
    data.frame|502 x 10