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

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.

Install the latest version of this package by entering the following in R:
install.packages("WrightMap")
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

View on CRAN

Functions

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

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