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Wright Map

IRT Item-Person Map with 'ConQuest' Integration

Package: WrightMap

Type: Package

Version: 1.3

Date: 2022-06-18

Author: David Torres Irribarra & Rebecca Freund

Maintainer: david@torresirribarra.me, rlfreund@berkeley.edu

Description: 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.

License: BSD 2 clause

Acknowledgments: Our thanks to Ronli Diakow & Beth Ayers for all their feedback and help.

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Version

Install

install.packages('WrightMap')

Monthly Downloads

1,314

Version

1.3

License

BSD_2_clause + file LICENSE

Maintainer

David Irribarra

Last Published

June 18th, 2022

Functions in WrightMap (1.3)

make.thresholds

Calculate Thurstonian thresholds.
extract.deltas

Extract Master's Delta parameters from a TAM model.
WrightMap

Wright Map: IRT Item-Person Map
CCCfit

Empirical category characteristic curve plot for the Partial Credit Model
make.deltas

Calculate Master's Delta parameters.
item.person.data

Processing CQmodel objects for plotting
ICCfit

Empirical item characteristic curve plot for the Rasch Model~
CQmodel

ConQuest Output Processing
fitgraph

Item Fit Graphs
item.side

Wright Map item sides
person.side

Wright Map person sides
ppPlot

Person probability plots
wrightMap

wrightMap: item-person maps
plotCI

Plotting confidence intervals and DIF