| transformations {NAEPirtparams} | R Documentation |
NAEP transformation constants.
Description
This data table contains NCES NAEP Assessment transformation constants from 1990 to 2015. To find the transformation constants for an assessment, filter the data table by level, subject, and year. Some assessments also require filtering by assessmentCode and/or accommodations.
Usage
transformations
Format
A data frame with columns
- source
source of data, character
- level
grade or age level of test, integer
- assessmentCode
"State" or "National", character
- accommodations
"accom" or "no-accom", character
- subtest
subtest within subject, character
- subject
subject of test, character
- year
year of test, integer
- scale
scale of subtest, numeric
- location
location of subtest, numeric
- subtestWeight
weight of subtest, numeric
References
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/trans_constants.aspx
Examples
## Not run:
t <- NAEPirtparams::transformations
t8M2005 <- t[t$level == 8 & t$subject == 'Mathematics' & t$year == 2005 & is.na(t$assessmentCode), ]
head(t8M2005)
source level ... subtest subject year scale location subtestWeight
229 website 8 ... algebra Mathematics 2005 35.64 281.79 0.30
228 website 8 ... data Mathematics 2005 40.37 281.91 0.15
227 website 8 ... geometry Mathematics 2005 33.22 275.64 0.20
226 website 8 ... measurement Mathematics 2005 46.57 275.86 0.15
225 website 8 ... number Mathematics 2005 37.78 277.11 0.20
## End(Not run)