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irtoys  

A Collection of Functions Related to Item Response Theory (IRT)
View on CRAN: Click here


Download and install irtoys package within the R console
Install from CRAN:
install.packages("irtoys")

Install from Github:
library("remotes")
install_github("cran/irtoys")

Install by package version:
library("remotes")
install_version("irtoys", "0.2.2")



Attach the package and use:
library("irtoys")
Maintained by
Ivailo Partchev
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2007-05-08
Latest Update: 2022-05-12
Description:
A collection of functions useful in learning and practicing IRT, which can be combined into larger programs. Provides basic CTT analysis, a simple common interface to the estimation of item parameters in IRT models for binary responses with three different programs (ICL, BILOG-MG, and ltm), ability estimation (MLE, BME, EAP, WLE, plausible values), item and person fit statistics, scaling methods (MM, MS, Stocking-Lord, and the complete Hebaera method), and a rich array of parametric and non-parametric (kernel) plots. Estimates and plots Haberman's interaction model when all items are dichotomously scored.
How to cite:
Ivailo Partchev (2007). irtoys: A Collection of Functions Related to Item Response Theory (IRT). R package version 0.2.2, https://cran.r-project.org/web/packages/irtoys. Accessed 02 Nov. 2026.
Previous versions and publish date:
(2026-07-09 07:50), 0.1.0 (2007-05-08 12:39), 0.1.1 (2008-06-25 08:46), 0.1.2 (2009-10-12 08:48), 0.1.3 (2010-11-06 16:00), 0.1.4 (2011-06-23 07:26), 0.1.5 (2012-07-01 20:17), 0.1.6 (2012-09-26 10:49), 0.1.7 (2014-01-23 00:16), 0.2.0 (2016-10-10 13:51), 0.2.1 (2017-12-15 14:33)
Other packages that cited irtoys R package
View irtoys citation profile
Other R packages that irtoys depends, imports, suggests or enhances
Complete documentation for irtoys
Functions, R codes and Examples using the irtoys R package
Some associated functions: Scored . Scored2pl . Unscored . ability . api . b1 . b2 . b3 . dpv . eap . erf . est . iif . interactionModel . irf . irfPlot . irtoys-package . itf . mlebme . normal.qu . npp . plot.iif . plot.imp . plot.irf . plot.tif . plot.trf . qrs . read.ip.bilog . read.ip.icl . read.qu.icl . read.resp . rim . sca . sco . scoreMetric . scp . sim . tet . tgf . tia . tif . trf . tsc . wle . 
Some associated R codes: ability.R . estimate.R . interaction.R . irtoys-package.R . itemfit.R . nonpar.R . readin.R . scale.R . tracelines.R . utils.R .  Full irtoys package functions and examples
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