lordif: Logistic Ordinal Regression Differential Item Functioning using IRT

Analysis of Differential Item Functioning (DIF) for dichotomous and polytomous items using an iterative hybrid of ordinal logistic regression and item response theory (IRT).

Author
Seung W. Choi, with contributions from Laura E. Gibbons and Paul K. Crane
Date of publication
2016-03-03 05:56:21
Maintainer
Seung W. Choi <choi.phd@gmail.com>
License
GPL (>= 2)
Version
0.3-3

View on CRAN

Man pages

Anxiety
A Measure of Anxiety
calcprob
calculates item response probabilities
calctheta
calculates EAP theta estimates and associated standard errors
collapse
collapses response categories
DFIT
calculates DFIT statistics
equate
performs Stocking-Lord Equating
extract
extracts IRT item parameters
getcutoff
determines a cutoff threshold
lordif
performs Logistic Ordinal Regression Differential Item...
lordif-package
Logistic Ordinal Regression Differential Item Functioning...
montecarlo
performs Monte Carlo simulations to generate empirical...
permute
performs permutation test for empirical cutoff thresholds
plot.lordif
Plot method for lordif class
plot.lordif.MC
Plot method for Monte Carlo simulation output
probgpcm
calculates item response probabilities according to GPCM
probgrm
calculates item response probabilities according to GRM
recode
recodes item responses
rundif
runs ordinal logistic regression DIF
runolr
runs ordinal logistic regression models
separate
splits item response vectors of DIF items by group
tcc
computes a test characteristic curve (tcc)

Files in this package

lordif
lordif/NAMESPACE
lordif/data
lordif/data/Anxiety.rda
lordif/R
lordif/R/print.lordif.R
lordif/R/plot.lordif.R
lordif/R/rundif.R
lordif/R/lordif.R
lordif/R/equate.R
lordif/R/print.lordif.MC.R
lordif/R/probgpcm.R
lordif/R/calcprob.R
lordif/R/lordif-internal.R
lordif/R/summary.lordif.R
lordif/R/runolr.R
lordif/R/probgrm.R
lordif/R/DFIT.R
lordif/R/recode.R
lordif/R/summary.lordif.MC.R
lordif/R/plot.lordif.MC.R
lordif/R/montecarlo.R
lordif/R/getcutoff.R
lordif/R/extract.R
lordif/R/collapse.R
lordif/R/tcc.R
lordif/R/calctheta.R
lordif/R/permute.R
lordif/R/separate.R
lordif/MD5
lordif/DESCRIPTION
lordif/man
lordif/man/lordif-package.Rd
lordif/man/plot.lordif.Rd
lordif/man/calcprob.Rd
lordif/man/calctheta.Rd
lordif/man/getcutoff.Rd
lordif/man/DFIT.Rd
lordif/man/plot.lordif.MC.Rd
lordif/man/separate.Rd
lordif/man/permute.Rd
lordif/man/montecarlo.Rd
lordif/man/runolr.Rd
lordif/man/equate.Rd
lordif/man/probgpcm.Rd
lordif/man/collapse.Rd
lordif/man/tcc.Rd
lordif/man/lordif.Rd
lordif/man/Anxiety.Rd
lordif/man/probgrm.Rd
lordif/man/extract.Rd
lordif/man/recode.Rd
lordif/man/rundif.Rd