Estimating IRT Parameters using the IRT Methodology

Documentation for package ‘IRTpp’ version 0.2.6.1

IRTpp-package	IRTpp : Item Response Theory Implemented in R and Cpp
alpha.c	Cronbach-Mesbah Curve
alpha.cronbach	Cronbach's alpha
an.parallel	Parallel Analysis
biserial.cor	Biserial Correlation
gutt	Guttman's Lambda
individual.traits	Estimate the latent traits.
information	Test or Item information
irtpp	Estimate a test item parameters.
irtpp.model	Valid model
irtpp.models	Available models
model.transform	Model transformations
normalize	Normalize a vector
orlando_itemf	Orlando's statistic
parameter.list	Parameter list form
parameter.matrix	Parameter matrix form
pattern.expand	Expansion of patterns
phi	Phi coefficient of correlation
plotenvelope	Confidence bands
plotevenlope	Confidence bands
polyserial.cor	Polyserial correlation
prob.2pl	2PL fast probability function
prob.3pl	3PL fast probability function
probability.1pl	1PL probability function
probability.2pl	2PL probability function
probability.3pl	3PL probability function
rtnorm	Truncated normal simulation
SimulateItemParameters	Simulates item parameters for UIRT models.
simulateItemParameters	Simulates item parameters for UIRT models.
simulateTest	Simulates a test
simulateTest.file	This function simulates tests according to a IRT model.
simulateTestMD	Simulate test Multidimensional
test.plot	Plot a test or an item.
Yule	Yule coefficient of correlation
z3_itemf	Z3 statistic.
z3_personf	Z3 Person fit statistic