WrightMap: IRT Item-Person Map with 'ConQuest' Integration
Version 1.2.1

A powerful yet simple graphical tool available in the field of psychometrics is the Wright Map (also known as item maps or item-person maps), which presents the location of both respondents and items on the same scale. Wright Maps are commonly used to present the results of dichotomous or polytomous item response models. The 'WrightMap' package provides functions to create these plots from item parameters and person estimates stored as R objects. Although the package can be used in conjunction with any software used to estimate the IRT model (e.g. 'TAM', 'mirt', 'eRm' or 'IRToys' in 'R', or 'Stata', 'Mplus', etc.), 'WrightMap' features special integration with 'ConQuest' to facilitate reading and plotting its output directly.The 'wrightMap' function creates Wright Maps based on person estimates and item parameters produced by an item response analysis. The 'CQmodel' function reads output files created using 'ConQuest' software and creates a set of data frames for easy data manipulation, bundled in a 'CQmodel' object. The 'wrightMap' function can take a 'CQmodel' object as input or it can be used to create Wright Maps directly from data frames of person and item parameters.

Browse man pages Browse package API and functions Browse package files

AuthorDavid Torres Irribarra & Rebecca Freund
Date of publication2016-03-23 23:41:08
MaintainerDavid Torres Irribarra <dti@berkeley.edu>
LicenseBSD_2_clause + file LICENSE
Version1.2.1
Package repositoryView on CRAN
InstallationInstall the latest version of this package by entering the following in R:
install.packages("WrightMap")

Man pages

CQmodel: ConQuest Output Processing
fitgraph: Item Fit Graphs
item.person.data: Processing CQmodel objects for plotting
item.side: Wright Map item sides
make.deltas: Calculate Master's Delta parameters.
make.thresholds: Calculate Thurstonian thresholds.
person.side: Wright Map person sides
plotCI: Plotting confidence intervals and DIF
ppPlot: Person probability plots
wrightMap: wrightMap: item-person maps
WrightMap-package: Wright Map: IRT Item-Person Map

Functions

CQmodel Man page Source code
WrightMap Man page
WrightMap-package Man page
cutLines Man page Source code
difplot Man page Source code
difplot.CQmodel Man page Source code
difplot.character Man page Source code
difplot.default Man page Source code
fitgraph Man page Source code
fitgraph.CQmodel Man page Source code
fitgraph.character Man page Source code
fitgraph.default Man page Source code
fitgraph.numeric Man page Source code
item.person.data Man page
item.side Man page
itemClassic Man page Source code
itemData Man page Source code
itemData.CQmodel Man page Source code
itemData.character Man page Source code
itemData.default Man page Source code
itemHist Man page Source code
itemModern Man page Source code
kidmap Man page
make.deltas Man page Source code
make.deltas.CQmodel Man page Source code
make.deltas.character Man page Source code
make.deltas.default Man page Source code
make.thresholds Man page Source code
make.thresholds.CQmodel Man page Source code
make.thresholds.character Man page Source code
make.thresholds.default Man page Source code
make.thresholds.matrix Man page Source code
person.side Man page
personData Man page Source code
personData.CQmodel Man page Source code
personData.character Man page Source code
personData.default Man page Source code
personDens Man page Source code
personHist Man page Source code
plot.CQmodel Man page Source code
plotCI Man page Source code
ppPlot Man page Source code
print.CQmodel Man page Source code
print.SOE Man page Source code
wrightMap Man page Source code

Files

inst
inst/CITATION
inst/extdata
inst/extdata/ex7a.eap
inst/extdata/ex6a.shw
inst/extdata/ex2.shw
inst/extdata/ex2b.eap
inst/extdata/ex4a.shw
inst/extdata/ex7a.shw
inst/extdata/ex2a.shw
inst/extdata/ex4a.mle
inst/extdata/ex2.eap
inst/extdata/ex2a.eap
inst/extdata/ex2b-2.shw
NAMESPACE
NEWS
R
R/personHist.R
R/itemData.character.R
R/wrightMap.R
R/itemData.R
R/itemData.CQmodel.R
R/fitgraph.R
R/make.deltas.CQmodel.R
R/CQmodel.R
R/difplot.R
R/print.SOE.R
R/fitgraph.default.R
R/difplot.default.R
R/personData.R
R/make.deltas.default.R
R/fitgraph.CQmodel.R
R/itemHist.R
R/itemData.default.R
R/print.CQmodel.R
R/make.thresholds.CQmodel.R
R/difplot.character.R
R/make.deltas.R
R/cutLines.R
R/make.thresholds.default.R
R/personDens.R
R/fitgraph.character.R
R/difplot.CQmodel.R
R/itemModern.R
R/make.thresholds.matrix.R
R/personData.character.R
R/personData.default.R
R/itemClassic.R
R/make.thresholds.character.R
R/plot.CQmodel.R
R/ppPlot.R
R/personData.CQmodel.R
R/plotCI.R
R/fitgraph.numeric.R
R/make.deltas.character.R
R/make.thresholds.R
README.md
MD5
DESCRIPTION
man
man/CQmodel.Rd
man/person.side.Rd
man/make.deltas.Rd
man/plotCI.Rd
man/ppPlot.Rd
man/fitgraph.Rd
man/wrightMap.Rd
man/item.side.Rd
man/make.thresholds.Rd
man/item.person.data.Rd
man/WrightMap-package.Rd
LICENSE
WrightMap documentation built on May 29, 2017, 11:01 a.m.