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Wright Map

IRT Item-Person Map with 'ConQuest' Integration

Package: WrightMap

Type: Package

Version: 1.4

Date: 2024-09-24

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

2,137

Version

1.4

License

BSD_2_clause + file LICENSE

Maintainer

Last Published

September 24th, 2024

Functions in WrightMap (1.4)

CCCfit

Empirical category characteristic curve plot for the Partial Credit Model
CQmodel

ConQuest Output Processing
item.side

Wright Map Item Sides
item.person.data

Processing CQmodel objects for plotting
make.deltas

Calculate Master's Delta parameters.
fitgraph

Item Fit Graphs
wrightMap

wrightMap: item-person maps
ppPlot

Person probability plots
person.side

Wright Map person sides
make.thresholds

Calculate Thurstonian thresholds.
sim.PCM

Simulate Item Responses for Partial Credit and Rasch Models with Varying Levels
plotCI

Plotting confidence intervals and DIF
ICCfit

Empirical item characteristic curve plot for the Rasch Model~
WrightMap

Wright Map: IRT Item-Person Map
extract.deltas

Extract Master's Delta parameters from a TAM model.