Extended Rasch Modeling


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Documentation for package ‘eRm’ version 1.0-2

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A B C E G I L M N P R S T V W X

-- A --

anova.eRm Analysis of Deviances for Rasch Models
anova.llra Analysis of Deviance for Linear Logistic Models with Relaxed Assumptions

-- B --

build_catdes Automatized Construction of LLRA Design Matrix
build_effdes Automatized Construction of LLRA Design Matrix
build_trdes Automatized Construction of LLRA Design Matrix
build_W Automatized Construction of LLRA Design Matrix

-- C --

coef.eRm Methods for extended Rasch models
coef.ppar Estimation of Person Parameters
collapse_W Convenient Collapsing of LLRA Design Matrix
confint.eRm Methods for extended Rasch models
confint.ppar Estimation of Person Parameters
confint.threshold Computation of item-category treshold parameters.

-- E --

eRm.data Data for Computing Extended Rasch Models

-- G --

get_item_cats Automatized Construction of LLRA Design Matrix
gofIRT Various model tests and fit indices
gofIRT.ppar Various model tests and fit indices

-- I --

IC Information criteria
IC.ppar Information criteria
itemfit Residuals, Personfit and Itemfit Statistics
itemfit.ppar Residuals, Personfit and Itemfit Statistics
item_info Calculate Item Information for 'eRm' objects
i_info Calculate Item Information for 'eRm' objects

-- L --

LLRA Fit Linear Logistic Models with Relaxed Assumptions (LLRA)
llra.datprep Prepare Data Set for LLRA Analysis
llraDat1 An Artificial LLRA Data Set
llraDat2 An Artificial LLRA Data Set
llradat3 An Artificial LLRA Data Set
LLTM Estimation of linear logistic test models
lltmdat1 Data for Computing Extended Rasch Models
lltmdat2 Data for Computing Extended Rasch Models
logLik.eRm Methods for extended Rasch models
logLik.ppar Estimation of Person Parameters
LPCM Estimation of linear partial credit models
lpcmdat Data for Computing Extended Rasch Models
LRSM Estimation of linear rating scale models
lrsmdat Data for Computing Extended Rasch Models
LRtest Computation of Andersen's LR-test.
LRtest.Rm Computation of Andersen's LR-test.

-- M --

MLoef Martin-Löf's Likelihood-Ratio-Test
model.matrix.eRm Methods for extended Rasch models

-- N --

NonparametricTests A Function to Perform Nonparametric Rasch Model Tests
NPtest A Function to Perform Nonparametric Rasch Model Tests

-- P --

PCM Estimation of partial credit models
pcmdat Data for Computing Extended Rasch Models
pcmdat2 Data for Computing Extended Rasch Models
person.parameter Estimation of Person Parameters
person.parameter.eRm Estimation of Person Parameters
personfit Residuals, Personfit and Itemfit Statistics
personfit.ppar Residuals, Personfit and Itemfit Statistics
PersonMisfit Person Misfit
PersonMisfit.ppar Person Misfit
phi.range Example User Function
plot.ppar Estimation of Person Parameters
plotDIF Confidence intervals plot of item parameter estimates.
plotGOF Computation of Andersen's LR-test.
plotGOF.LR Computation of Andersen's LR-test.
plotGR Plot Treatment or Covariate Effects for LLRA
plotICC ICC Plots
plotICC.Rm ICC Plots
plotINFO Plot Information For "eRm" objects
plotjointICC ICC Plots
plotjointICC.dRm ICC Plots
plotPImap Person-Item Map
plotPWmap Pathway Map
plotTR Plot Trend Effects for LLRA
pmat Residuals, Personfit and Itemfit Statistics
pmat.ppar Residuals, Personfit and Itemfit Statistics
predict.ppar Predict methods
print.eRm Methods for extended Rasch models
print.eRm_anova Analysis of Deviances for Rasch Models
print.eRm_SepRel Person Separation Reliability
print.gof Various model tests and fit indices
print.ifit Residuals, Personfit and Itemfit Statistics
print.llra Fit Linear Logistic Models with Relaxed Assumptions (LLRA)
print.logLik.ppar Estimation of Person Parameters
print.LR Computation of Andersen's LR-test.
print.MLoef Martin-Löf's Likelihood-Ratio-Test
print.pfit Residuals, Personfit and Itemfit Statistics
print.ppar Estimation of Person Parameters
print.resid Residuals, Personfit and Itemfit Statistics
print.step Stepwise item elimination
print.summary.llra Summarizing Linear Logistic Models with Relaxed Assumptions (LLRA)
print.threshold Computation of item-category treshold parameters.
print.wald Item-Specific Wald Test

-- R --

raschdat1 Data for Computing Extended Rasch Models
raschdat1_RM_fitted Data for Computing Extended Rasch Models
raschdat1_RM_lrres2 Data for Computing Extended Rasch Models
raschdat1_RM_plotDIF Data for Computing Extended Rasch Models
raschdat2 Data for Computing Extended Rasch Models
raschdat3 Data for Computing Extended Rasch Models
raschdat4 Data for Computing Extended Rasch Models
RaschSampler Rasch Sampler Package
residuals.ppar Residuals, Personfit and Itemfit Statistics
RM Estimation of Rasch Models
rsampler Sampling Binary Matrices
RSctr Control Object
rsctrl Controls for the Sampling Function
rsextrmat Extracting a Matrix
rsextrobj Extracting Encoded Sample Matrices
RSM Estimation of rating scale models
rsmdat Data for Computing Extended Rasch Models
RSmpl Sample Objects
RSmplext Sample Objects
rstats Calculating Statistics for the Sampled Matrices

-- S --

SepRel Person Separation Reliability
sim.2pl Simulation of 2-PL Data
sim.locdep Simulation locally dependent items
sim.rasch Simulation of Rasch homogeneous data
sim.xdim Simulation of multidimensional binary data
stepwiseIt Stepwise item elimination
stepwiseIt.eRm Stepwise item elimination
summary.eRm Methods for extended Rasch models
summary.eRm_SepRel Person Separation Reliability
summary.gof Various model tests and fit indices
summary.llra Summarizing Linear Logistic Models with Relaxed Assumptions (LLRA)
summary.LR Computation of Andersen's LR-test.
summary.MLoef Martin-Löf's Likelihood-Ratio-Test
summary.ppar Estimation of Person Parameters
summary.RSctr Summary Method for Control Objects
summary.RSmpl Summary Methods for Sample Objects
summary.RSmplext Summary Methods for Sample Objects
summary.threshold Computation of item-category treshold parameters.

-- T --

test_info Calculate Test Information For 'eRm' objects
thresholds Computation of item-category treshold parameters.
thresholds.eRm Computation of item-category treshold parameters.

-- V --

vcov.eRm Methods for extended Rasch models

-- W --

Waldtest Item-Specific Wald Test
Waldtest.Rm Item-Specific Wald Test

-- X --

xmpl Example Data
xmplbig Example Data