eRm: Extended Rasch Modeling

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The eRm package fits Rasch models (RM), linear logistic test models (LLTM), rating scale model (RSM), linear rating scale models (LRSM), partial credit models (PCM), and linear partial credit models (LPCM). Missing values are allowed in the data matrix. Additional features are the ML estimation of the person parameters, Andersen's LR-test, item-specific Wald test, Martin-Löf-Test, nonparametric Monte-Carlo Tests, itemfit and personfit statistics including infit and outfit measures, various ICC and related plots, automated stepwise item elimination, simulation module for various binary data matrices. An eRm platform is provided at R-forge (see URL).

Author
Patrick Mair [cre, aut], Reinhold Hatzinger [aut], Marco J. Maier [aut], Thomas Rusch [ctb]
Date of publication
2016-11-20 16:47:49
Maintainer
Patrick Mair <mair@fas.harvard.edu>
License
GPL-2
Version
0.15-7
URLs

View on R-Forge

Man pages

anova.eRm
Analysis of Deviances for Rasch Models
anova.llra
Analysis of Deviance for Linear Logistic Models with Relaxed...
build_W
Automatized Construction of LLRA Design Matrix
collapse_W
Convenient Collapsing of LLRA Design Matrix
eRm.data
Data for Computing Extended Rasch Models
eRm-package
extended Rasch modeling
gofIRT
Various model tests and fit indices
IC
Information criteria
itemfit.ppar
Residuals, Personfit and Itemfit Statistics
item_info
Calculate Item Information for 'eRm' objects
LLRA
Fit Linear Logistic Models with Relaxed Assumptions (LLRA)
llraDat1
An Artificial LLRA Data Set
llraDat2
An Artificial LLRA Data Set
llradat3
An Artificial LLRA Data Set
llra.datprep
Prepare Data Set for LLRA Analysis
LLTM
Estimation of linear logistic test models
LPCM
Estimation of linear partial credit models
LRSM
Estimation of linear rating scale models
LRtest
Computation of Andersen's LR-test.
MLoef
Martin-Löf's Likelihood-Ratio-Test
NPtest
A Function to Perform Nonparametric Rasch Model Tests
PCM
Estimation of partial credit models
person.parameter
Estimation of Person Parameters
phi.range
Example User Function
plotDIF
Confidence intervals plot of item parameter estimates.
plotGR
Plot Treatment or Covariate Effects for LLRA
plotICC
ICC Plots
plotINFO
Plot Information For "eRm" objects
plotPImap
Person-Item Map
plotPWmap
Pathway Map
plotTR
Plot Trend Effects for LLRA
predict.ppar
Predict methods
print.eRm
Methods for extended Rasch models
RaschSampler
Rasch Sampler Package
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
RSmpl
Sample Objects
rstats
Calculating Statistics for the Sampled Matrices
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
summary.llra
Summarizing Linear Logistic Models with Relaxed Assumptions...
summary.RSctr
Summary Method for Control Objects
summary.RSmpl
Summary Methods for Sample Objects
test_info
Calculate Test Information For 'eRm' objects
thresholds
Computation of item-category treshold parameters.
Waldtest
Item-Specific Wald Test
xmpl
Example Data

Files in this package

eRm/.Rinstignore
eRm/DESCRIPTION
eRm/NAMESPACE
eRm/NEWS
eRm/R
eRm/R/IC.default.R
eRm/R/IC.ppar.r
eRm/R/IC.r
eRm/R/LLRA.R
eRm/R/LLTM.R
eRm/R/LPCM.R
eRm/R/LRSM.R
eRm/R/LRtest.R
eRm/R/LRtest.Rm.R
eRm/R/MLoef.R
eRm/R/NPtest.R
eRm/R/PCM.R
eRm/R/RM.R
eRm/R/ROCR_aux.R
eRm/R/RSM.R
eRm/R/Rsquared.R
eRm/R/SepRel.R
eRm/R/Waldtest.R
eRm/R/Waldtest.Rm.R
eRm/R/anova.eRm.R
eRm/R/anova.llra.R
eRm/R/build_W.R
eRm/R/checkdata.R
eRm/R/cldeviance.R
eRm/R/cmlprep.R
eRm/R/coef.eRm.R
eRm/R/coef.ppar.R
eRm/R/collapse_W.R
eRm/R/confint.eRm.r
eRm/R/confint.ppar.r
eRm/R/confint.threshold.r
eRm/R/cwdeviance.r
eRm/R/datcheck.LRtest.r
eRm/R/datcheck.R
eRm/R/datprep_LLTM.R
eRm/R/datprep_LPCM.R
eRm/R/datprep_LRSM.R
eRm/R/datprep_PCM.R
eRm/R/datprep_RM.R
eRm/R/datprep_RSM.R
eRm/R/fitcml.R
eRm/R/gofIRT.R
eRm/R/gofIRT.ppar.R
eRm/R/hoslem.R
eRm/R/invalid.R
eRm/R/item_info.R
eRm/R/itemfit.R
eRm/R/itemfit.ppar.R
eRm/R/labeling.internal.r
eRm/R/likLR.R
eRm/R/llra.datprep.R
eRm/R/llra.internals.R
eRm/R/logLik.eRm.r
eRm/R/logLik.ppar.r
eRm/R/model.matrix.eRm.R
eRm/R/performance.R
eRm/R/performance_measures.R
eRm/R/performance_plots.R
eRm/R/person.parameter.R
eRm/R/person.parameter.eRm.R
eRm/R/personfit.R
eRm/R/personfit.ppar.R
eRm/R/phi.range.R
eRm/R/pifit.internal.R
eRm/R/plist.internal.R
eRm/R/plot.ppar.r
eRm/R/plotCI.R
eRm/R/plotDIF.R
eRm/R/plotGOF.LR.R
eRm/R/plotGOF.R
eRm/R/plotGR.R
eRm/R/plotICC.R
eRm/R/plotICC.Rm.R
eRm/R/plotINFO.R
eRm/R/plotPImap.R
eRm/R/plotPWmap.R
eRm/R/plotTR.R
eRm/R/plotjointICC.R
eRm/R/plotjointICC.dRm.R
eRm/R/pmat.R
eRm/R/pmat.default.R
eRm/R/pmat.ppar.R
eRm/R/predict.ppar.R
eRm/R/prediction.R
eRm/R/print.ICr.r
eRm/R/print.LR.R
eRm/R/print.MLoef.r
eRm/R/print.eRm.R
eRm/R/print.gof.R
eRm/R/print.ifit.R
eRm/R/print.llra.R
eRm/R/print.logLik.eRm.R
eRm/R/print.logLik.ppar.r
eRm/R/print.pfit.R
eRm/R/print.ppar.R
eRm/R/print.resid.R
eRm/R/print.step.r
eRm/R/print.summary.llra.R
eRm/R/print.threshold.r
eRm/R/print.wald.R
eRm/R/residuals.ppar.R
eRm/R/rostdeviance.r
eRm/R/rsampler.R
eRm/R/rsctrl.R
eRm/R/rserror.R
eRm/R/rsextrmat.R
eRm/R/rsextrobj.R
eRm/R/rstats.R
eRm/R/rsunpack.R
eRm/R/sim.2pl.R
eRm/R/sim.locdep.R
eRm/R/sim.rasch.R
eRm/R/sim.xdim.R
eRm/R/stepwiseIt.R
eRm/R/stepwiseIt.eRm.R
eRm/R/summary.LR.r
eRm/R/summary.MLoef.r
eRm/R/summary.RSctr.R
eRm/R/summary.RSmpl.R
eRm/R/summary.RSmplext.R
eRm/R/summary.eRm.R
eRm/R/summary.gof.R
eRm/R/summary.llra.R
eRm/R/summary.ppar.R
eRm/R/summary.threshold.r
eRm/R/test_info.R
eRm/R/thresholds.eRm.r
eRm/R/thresholds.r
eRm/R/vcov.eRm.R
eRm/R/zzz.R
eRm/build
eRm/build/partial.rdb
eRm/build/vignette.rds
eRm/data
eRm/data/llraDat1.rda
eRm/data/llraDat2.rda
eRm/data/llradat3.rda
eRm/data/lltmdat1.rda
eRm/data/lltmdat2.rda
eRm/data/lpcmdat.rda
eRm/data/lrsmdat.rda
eRm/data/pcmdat.rda
eRm/data/pcmdat2.rda
eRm/data/raschdat1.rda
eRm/data/raschdat1_RM_fitted.RData
eRm/data/raschdat1_RM_lrres2.RData
eRm/data/raschdat1_RM_plotDIF.RData
eRm/data/raschdat2.rda
eRm/data/raschdat3.rda
eRm/data/raschdat4.rda
eRm/data/rsmdat.rda
eRm/data/xmpl.RData
eRm/data/xmplbig.RData
eRm/inst
eRm/inst/CITATION
eRm/inst/NEWS.Rd
eRm/inst/NEWS.pdf
eRm/inst/doc
eRm/inst/doc/eRm.R
eRm/inst/doc/eRm.Rnw
eRm/inst/doc/eRm.pdf
eRm/man
eRm/man/IC.Rd
eRm/man/LLRA.Rd
eRm/man/LLTM.Rd
eRm/man/LPCM.Rd
eRm/man/LRSM.Rd
eRm/man/LRtest.Rd
eRm/man/MLoef.Rd
eRm/man/NPtest.Rd
eRm/man/PCM.Rd
eRm/man/RM.Rd
eRm/man/RSM.Rd
eRm/man/RSctr.Rd
eRm/man/RSmpl.Rd
eRm/man/RaschSampler.Rd
eRm/man/SepRel.Rd
eRm/man/Waldtest.Rd
eRm/man/anova.eRm.Rd
eRm/man/anova.llra.Rd
eRm/man/build_W.Rd
eRm/man/collapse_W.Rd
eRm/man/eRm-package.Rd
eRm/man/eRm.data.Rd
eRm/man/gofIRT.Rd
eRm/man/item_info.Rd
eRm/man/itemfit.ppar.Rd
eRm/man/llra.datprep.Rd
eRm/man/llraDat1.Rd
eRm/man/llraDat2.Rd
eRm/man/llradat3.Rd
eRm/man/person.parameter.Rd
eRm/man/phi.range.Rd
eRm/man/plotDIF.Rd
eRm/man/plotGR.Rd
eRm/man/plotICC.Rd
eRm/man/plotINFO.Rd
eRm/man/plotPImap.Rd
eRm/man/plotPWmap.Rd
eRm/man/plotTR.Rd
eRm/man/predict.ppar.Rd
eRm/man/print.eRm.Rd
eRm/man/rsampler.Rd
eRm/man/rsctrl.Rd
eRm/man/rsextrmat.Rd
eRm/man/rsextrobj.Rd
eRm/man/rstats.Rd
eRm/man/sim.2pl.Rd
eRm/man/sim.locdep.Rd
eRm/man/sim.rasch.Rd
eRm/man/sim.xdim.Rd
eRm/man/stepwiseIt.Rd
eRm/man/summary.RSctr.Rd
eRm/man/summary.RSmpl.Rd
eRm/man/summary.llra.Rd
eRm/man/test_info.Rd
eRm/man/thresholds.Rd
eRm/man/xmpl.Rd
eRm/src
eRm/src/RaschSampler.f90
eRm/src/components.c
eRm/src/components.h
eRm/src/geodist.c
eRm/src/geodist.h
eRm/vignettes
eRm/vignettes/UCML.pdf
eRm/vignettes/eRm.Rnw
eRm/vignettes/eRm_object_tree.pdf
eRm/vignettes/eRmvig.bib
eRm/vignettes/modelhierarchy.pdf