Package: lordif 0.4.2

lordif: Logistic Ordinal Regression Differential Item Functioning using IRT

Performs analysis of Differential Item Functioning (DIF) for dichotomous and polytomous items using an iterative hybrid of ordinal logistic regression and item response theory (IRT) according to Choi, Gibbons, and Crane (2011) <doi:10.18637/jss.v039.i08>.

Authors:Seung W. Choi [aut, cre], Laura E. Gibbons [aut], Paul K. Crane [aut]

lordif_0.4.2.tar.gz
lordif_0.4.2.zip(r-4.7)lordif_0.4.2.zip(r-4.6)lordif_0.4.2.zip(r-4.5)
lordif_0.4.2.tgz(r-4.6-any)lordif_0.4.2.tgz(r-4.5-any)
lordif_0.4.2.tar.gz(r-4.7-any)lordif_0.4.2.tar.gz(r-4.6-any)
lordif_0.4.2.tgz(r-4.6-emscripten)
manual.pdf |manual.html✨
card.svg |card.png
lordif/json (API)

# Install 'lordif' in R:

install.packages('lordif', repos = c('https://choi-phd.r-universe.dev', 'https://cloud.r-project.org'))

Bug tracker:https://github.com/choi-phd/lordif/issues

Datasets:

Anxiety - A Measure of Anxiety

On CRAN:

5.57 score 2 stars 1 packages 107 scripts 1.2k downloads 54 mentions 19 exports 128 dependencies

Last updated from:758348bf82. Checks:7 NOTE, 2 OK. Indexed: yes.

Target	Result	Time
linux-devel-x86_64	NOTE	191
source / vignettes	OK	214
linux-release-x86_64	NOTE	195
macos-release-arm64	NOTE	144
macos-oldrel-arm64	NOTE	155
windows-devel	NOTE	143
windows-release	NOTE	132
windows-oldrel	NOTE	141
wasm-release	OK	146

Exports:calcprob calctheta collapse DFIT equate extract getcutoff lordif montecarlo permute plot.lordif plot.lordif.MC probgpcm probgrm recode rundif runolr separate tcc

Dependencies:audio backports base64enc beepr brio bslib cachem callr checkmate class cli clipr cluster codetools colorspace cpp11 crayon data.table dcurver Deriv desc diffobj digest doSNOW dplyr e1071 evaluate farver fastmap fontawesome foreach foreign Formula fs future future.apply generics ggplot2 globals glue GPArotation gridExtra gtable highr Hmisc htmlTable htmltools htmlwidgets isoband iterators jquerylib jsonlite knitr labeling lattice lifecycle listenv magrittr MASS Matrix MatrixModels memoise mgcv mime mirai mirt multcomp mvtnorm nanonext nlme nnet parallelly pbapply permute pillar pkgbuild pkgconfig pkgload polspline praise processx progressr proxy ps qs2 quantreg R.methodsS3 R.oo R.utils R6 rappdirs RColorBrewer Rcpp RcppArmadillo RcppParallel rlang rmarkdown rms rpart rprojroot rstudioapi S7 sandwich sass scales sessioninfo SimDesign snow SparseM splines2 stringfish stringi stringr survival testthat TH.data tibble tidyselect tinytex utf8 vctrs vegan viridisLite waldo withr xfun yaml zoo

Citation

Development and contributors

Readme and manuals

Help Manual

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