Scored                  Binary (true/false) responses to a test
Scored2pl               Example item parameters
Unscored                Original, unscored multiple-choice responses to
                        a test
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 model
sca                     Linear transformation of the IRT scale
sco                     Score a multiple choice test
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
wle                     Bias-corrected (Warm's) estimates of ability
