Man pages for irtoys
A Collection of Functions Related to Item Response Theory (IRT)

abilityEstimate ability
apiThe api appropriateness index
b1Example item parameters 1PL (Bilog)
b2Example item parameters 2PL (Bilog)
b3Example item parameters 3PL (Bilog)
dpvDraw plausible values
eapEAP estimation of ability
erfPlot empirical response function
estEstimate item parameters
iifItem information function
interactionModelInteraction model
irfItem response function
irfPlotItem fit plot
irtoys-packageEstimate and plot IRT models for binary responses
itfTest item fit
mlebmeMaximum likelihood and Bayes Modal estimation of ability
normal.quNormal quadrature points and weights
nppNon-parametric characteristic curves
plot.iifA plot method for item information functions
plot.impA plot method for the interaction model
plot.irfA plot method for item response functions
plot.tifA plot method for test information functions
plot.trfA plot method for test response functions
qrsQuantiles of the ranked sum scores
read.ip.bilogRead in parameter estimates
read.ip.iclRead in parameter estimates
read.qu.iclRead in quadrature
read.respRead responses from a file
rimItem-total regressions for the Rasch vs. the interaction...
scaLinear transformation of the IRT scale
scoScore a multiple choice test
ScoredBinary (true/false) responses to a test
Scored2plExample item parameters
scoreMetricSum score metric
scpPlot observed and predicted scores against ability
simSimulate response data
tetApproximate tetchoric correlation matrix
tgfNon-parametric option curves
tiaElementary test-item analysis
tifTest information function
trfTest response function
tscTrue scores with standard errors
UnscoredOriginal, unscored multiple-choice responses to a test
wleBias-corrected (Warm's) estimates of ability
irtoys documentation built on Dec. 15, 2017, 5:04 p.m.