irtoys: A Collection of Functions Related to Item Response Theory (IRT)
Version 0.2.0

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.

Browse man pages Browse package API and functions Browse package files

AuthorIvailo Partchev
Date of publication2016-10-10 13:51:54
MaintainerIvailo Partchev <partchev@gmail.com>
LicenseGPL (>= 2)
Version0.2.0
Package repositoryView on CRAN
InstallationInstall the latest version of this package by entering the following in R:
install.packages("irtoys")

Man pages

ability: Estimate ability
api: The api appropriateness index
b1: Example item parameters 1PL (Bilog)
b2: Example item parameters 2PL (Bilog)
b3: Example item parameters 3PL (Bilog)
dpv: Draw plausible values
eap: EAP estimation of ability
erf: Plot empirical response function
est: Estimate item parameters
iif: Item information function
interactionModel: Interaction model
irf: Item response function
irfPlot: Item fit plot
irtoys-package: Estimate and plot IRT models for binary responses
itf: Test item fit
mlebme: Maximum likelihood and Bayes Modal estimation of ability
normal.qu: Normal quadrature points and weights
npp: Non-parametric characteristic curves
plot.iif: A plot method for item information functions
plot.imp: A plot method for the interaction model
plot.irf: A plot method for item response functions
plot.tif: A plot method for test information functions
plot.trf: A plot method for test response functions
qrs: Quantiles of the ranked sum scores
read.ip.bilog: Read in parameter estimates
read.ip.icl: Read in parameter estimates
read.qu.icl: Read in quadrature
read.resp: Read responses from a file
rim: Item-total regressions for the Rasch vs. the interaction...
sca: Linear transformation of the IRT scale
sco: Score a multiple choice test
Scored: Binary (true/false) responses to a test
Scored2pl: Example item parameters
scoreMetric: Sum score metric
scp: Plot observed and predicted scores against ability
sim: Simulate response data
tet: Approximate tetchoric correlation matrix
tgf: Non-parametric option curves
tia: Elementary test-item analysis
tif: Test information function
trf: Test response function
tsc: True scores with standard errors
Unscored: Original, unscored multiple-choice responses to a test
wle: Bias-corrected (Warm's) estimates of ability

Functions

IM_update Source code
Scored Man page
Scored2pl Man page
Unscored Man page
ability Man page Source code
adv.scale Source code
api Man page Source code
b1 Man page
b2 Man page
b3 Man page
bce.one Source code
bcv Source code
clik Source code
curv Source code
ddf Source code
dpv Man page Source code
dpv.one Source code
eap Man page Source code
eap.one Source code
elsym Source code
erf Man page Source code
est Man page Source code
est.blm Source code
est.icl Source code
est.ltm Source code
grp Source code
hb Source code
hb2 Source code
iif Man page Source code
interactionModel Man page Source code
irf Man page Source code
irfPlot Man page Source code
irtoys Man page
irtoys-package Man page
itf Man page Source code
like Source code
llf Source code
mle.one Source code
mlebme Man page Source code
normal.qu Man page Source code
npp Man page Source code
plot.iif Man page Source code
plot.imp Man page Source code
plot.irf Man page Source code
plot.tif Man page Source code
plot.trf Man page Source code
qrs Man page Source code
read.ip.bilog Man page Source code
read.ip.icl Man page Source code
read.qu.icl Man page Source code
read.resp Man page Source code
rim Man page Source code
sca Man page Source code
scf Source code
sco Man page Source code
scoreMetric Man page Source code
scp Man page Source code
sim Man page Source code
simple.scale Source code
sl Source code
sl2 Source code
tet Man page Source code
tgf Man page Source code
tia Man page Source code
tif Man page Source code
trf Man page Source code
tsc Man page Source code
wle Man page Source code

Files

inst
inst/doc
inst/doc/irtoys-vignette.R
inst/doc/irtoys-vignette.Rmd
inst/doc/irtoys-vignette.html
src
src/interaction.c
src/interaction.h
NAMESPACE
NEWS
data
data/b3.RData
data/b2.RData
data/Scored2pl.RData
data/b1.RData
data/Scored.RData
data/Unscored.RData
R
R/nonpar.R
R/scale.R
R/utils.R
R/tracelines.R
R/ability.R
R/itemfit.R
R/readin.R
R/estimate.R
R/irtoys-package.R
R/interaction.R
vignettes
vignettes/irtoys-vignette_cache
vignettes/irtoys-vignette_cache/html
vignettes/irtoys-vignette_cache/html/unnamed-chunk-2_274a24304e67b345667878d6dd433355.rdb
vignettes/irtoys-vignette_cache/html/unnamed-chunk-2_274a24304e67b345667878d6dd433355.rdx
vignettes/irtoys-vignette_cache/html/__packages
vignettes/irtoys-vignette_cache/html/unnamed-chunk-2_274a24304e67b345667878d6dd433355.RData
vignettes/irtoys.bib
vignettes/irtoys-vignette.Rmd
MD5
build
build/vignette.rds
DESCRIPTION
man
man/est.Rd
man/read.ip.bilog.Rd
man/interactionModel.Rd
man/plot.irf.Rd
man/rim.Rd
man/Scored2pl.Rd
man/b1.Rd
man/read.resp.Rd
man/b3.Rd
man/irf.Rd
man/dpv.Rd
man/api.Rd
man/tia.Rd
man/tgf.Rd
man/scp.Rd
man/tet.Rd
man/irtoys-package.Rd
man/mlebme.Rd
man/scoreMetric.Rd
man/tif.Rd
man/read.qu.icl.Rd
man/tsc.Rd
man/qrs.Rd
man/sca.Rd
man/read.ip.icl.Rd
man/eap.Rd
man/iif.Rd
man/irfPlot.Rd
man/trf.Rd
man/plot.imp.Rd
man/itf.Rd
man/Scored.Rd
man/sco.Rd
man/npp.Rd
man/b2.Rd
man/normal.qu.Rd
man/ability.Rd
man/wle.Rd
man/plot.tif.Rd
man/Unscored.Rd
man/erf.Rd
man/plot.iif.Rd
man/sim.Rd
man/plot.trf.Rd
irtoys documentation built on May 19, 2017, 6:01 p.m.