Simple interface to the estimation and plotting of IRT models

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Documentation for package ‘irtoys’ version 0.1.2

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irtoys-package Estimate and plot IRT models bor binary responses
adv.scale Internal functions
api The Z3 appropriateness index
ddf Internal functions
dpv Draw plausible values
dpv.one Internal functions
eap EAP estimation of ability
eap.one Internal functions
est Estimate item parameters
est.blm Internal functions
est.icl Internal functions
est.ltm Internal functions
grp Bin the latent variable estimates
hb Internal functions
iif Item information function
internal Internal functions
irf Item response function
irtoys Estimate and plot IRT models bor binary responses
itf Test item fit
l2m Transform a list of lists... to a matrix
like Internal functions
llf Internal functions
mle.one Internal functions
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.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
sca Linear transformation of the IRT scale
sco Score a multiple choice test
Scored Binary (true/false) responses to a test
sim Simulate response data
simple.scale Internal functions
sl Internal functions
tgp Non-parametric option curves
tif Test information function
trf Test response function
tsc True scores with standard errors
Unscored Original, unscored multiple-choice responses to a test