adjustments: NAEP IRT item adjustments.
In NAEPirtparams: IRT Parameters for the National Assessment of Education Progress

Description Usage Format References Examples

This data table contains the item adjustment information that NAEP implemented in scaling from 2000 to 2013. The handful of items with responses that do not fit the item response models were deleted or had the scoring categories collapsed before the final scaling. To find all adjustments and deletions for an assessment, filter the data table by level, subject, and year. Assessments in 2000 also require filtering by accommodations.

1	adjustments

A data frame with columns

source: source of data, character
level: grade or age level of test, integer
levelType: "grade" or "age", character
NAEPid: test item ID, character
accommodations: "accom" or "no-accom", character
subject: subject of test, character
year: year of test, integer
adjustment: "Collapsed" or "Deleted", character
from: possible scores before adjustment, character
to: possible scores after adjustment, character

Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 1990-2015, various subjects. Retrieved from https://nces.ed.gov/nationsreportcard/tdw/analysis/scaling_avoidviolat_treatment.aspx

## Not run: 

adj <- NAEPirtparams::adjustments
adj8M2005 <- adj[adj$level == 8 & adj$subject == 'Mathematics' & adj$year == 2005, ]
head(adj8M2005)
     source level levelType  NAEPid accommodations     subject year adjustment    from      to
189 website     8     grade M067202           <NA> Mathematics 2005    Deleted    <NA>    <NA>
190 website     8     grade M052801           <NA> Mathematics 2005    Deleted    <NA>    <NA>
191 website     8     grade M073602           <NA> Mathematics 2005    Deleted    <NA>    <NA>
200 website     8     grade M141301           <NA> Mathematics 2005  Collapsed 0,1,2,3 0,1,1,2
201 website     8     grade M085701           <NA> Mathematics 2005  Collapsed   0,1,2   0,0,1
202 website     8     grade M145101           <NA> Mathematics 2005  Collapsed 0,1,2,3 0,1,1,1


## End(Not run)