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)

[Package NAEPirtparams version 1.0.0 Index]