NAEP item response theory parameters and adjustments
Get IRT parameters by filtering
parameters to the level, subject, and year you need. Use this to create
Get information on deleted and collapsed items by filtering
adjustments to the level, subject, and year you need. This will be used to correct scoring in
Get information on transformation constants by
transformations to the level, subject, and year you need. Use this to create
Note that for all three datasets filtering by assessment code and/or accommodations may be required for assessments from 1990 to 2000. These datasets, as well as the
mml function, are used within
R CMD build --resave-data NAEPirtparams
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