Package: easyRasch2 1.4.0

easyRasch2: Psychometric Analysis with Rasch Measurement Theory

Streamlines reproducible Rasch measurement theory analyses for ordinal item-response data, combining estimation routines from 'eRm', 'psychotools', 'mirt', 'iarm', and 'lavaan' with consistent diagnostic, plotting, and reporting layers. Covers the four basic psychometric criteria summarised by Christensen et al. (2021) <doi:10.1111/sms.13908> -- unidimensionality, local independence, ordered response category thresholds, and invariance across subgroups -- together with item fit, targeting, reliability, category functioning, and descriptive item-response plots. A distinguishing feature is the use of simulation-based critical values to replace rule-of-thumb cutoffs for conditional infit mean-square, item-rest-score gamma, Yen's Q3 local-dependence statistic, the largest residual-PCA eigenvalue, ordinal CFA fit indices, and partial-gamma DIF and local-dependence coefficients, optionally augmented with multiplicity-corrected bootstrap p-values. Outputs are knitr::kable() tables and 'ggplot2' figures suitable for direct inclusion in 'Quarto' and 'R Markdown' reports.

Authors:Magnus Johansson [aut, cre], Nicklas Korsell [ctb], Mirka Henninger [ctb], Jan Radek [ctb]

easyRasch2_1.4.0.tar.gz
easyRasch2_1.4.0.zip(r-4.7-any)easyRasch2_1.4.0.zip(r-4.6-any)easyRasch2_1.4.0.zip(r-4.5-any)
easyRasch2_1.4.0.tgz(r-4.6-any)easyRasch2_1.4.0.tgz(r-4.5-any)
easyRasch2_1.4.0.tar.gz(r-4.7-any)easyRasch2_1.4.0.tar.gz(r-4.6-any)
easyRasch2_1.4.0.tgz(r-4.6-emscripten)
manual.pdf |manual.html✨
DESCRIPTION |NEWS
card.svg |card.png
easyRasch2/json (API)

# Install 'easyRasch2' in R:

install.packages('easyRasch2', repos = c('https://pgmj.r-universe.dev', 'https://cloud.r-project.org'))

Bug tracker:https://github.com/pgmj/easyrasch2/issues

Pkgdown/docs site:https://pgmj.github.io

Datasets:

phq9 - PHQ-9 Depression Screener

On CRAN:

psychometrics rasch rasch-measurement-model

5.85 score 4 stars 14 scripts 568 downloads 44 exports 77 dependencies

Last updated from:b45f3a39d9. Checks:9 OK. Indexed: yes.

Target	Result	Time
linux-devel	OK	253
source / vignettes	OK	293
linux-release	OK	252
macos-release	OK	132
macos-oldrel	OK	201
windows-devel	OK	293
windows-release	OK	204
windows-oldrel	OK	207
wasm-release	OK	157

Exports:RMdifGamma RMdifGammaCutoff RMdifGammaPlot RMdifLR RMdifTree RMdimCFA RMdimCFACutoff RMdimCFAPlot RMdimMartinLof RMdimMartinLofResiduals RMdimResidualPCA RMdimResidualPCACutoff RMitemCatProb RMitemHierarchy RMitemICCPlot RMitemInfit RMitemInfitCutoff RMitemInfitCutoffMI RMitemInfitCutoffPlot RMitemInfitMI RMitemInfitPlot RMitemParameters RMitemRestscore RMitemRestscoreBoot RMitemRestscoreCutoff RMitemRestscorePlot RMlocdepGamma RMlocdepGammaCutoff RMlocdepGammaPlot RMlocdepQ3 RMlocdepQ3Cutoff RMlocdepQ3Plot RMpersonChange RMpersonFit RMpersonParameters RMplotBar RMplotStackedbar RMplotTile RMreliability RMreliabilityCurve RMretestSD RMscoreSE RMtargeting RMUreliability

Dependencies:audio beepr brio callr class cli clipr cluster codetools crayon dcurver Deriv desc diffobj digest dplyr e1071 evaluate fs future future.apply generics globals glue GPArotation gridExtra gtable highr jsonlite knitr lattice lifecycle listenv magrittr MASS Matrix mgcv mirt nlme otel parallelly pbapply permute pillar pkgbuild pkgconfig pkgload praise processx progressr proxy ps psychotools qs2 R.methodsS3 R.oo R.utils R6 Rcpp RcppArmadillo RcppParallel rlang rprojroot sessioninfo SimDesign splines2 stringfish testthat tibble tidyselect utf8 vctrs vegan waldo withr xfun yaml

A Rasch analysis workflow with easyRasch2

Rendered fromeasyRasch2.Rmdusingknitr::rmarkdown

Last update: 2026-10-06
Started: 2026-05-22

Help page	Topics
PHQ-9 Depression Screener (NHANES Subsample)	phq9
Partial Gamma DIF Analysis	RMdifGamma
Simulation-Based Partial Gamma DIF Cutoff Determination	RMdifGammaCutoff
Plot Distribution of Simulated Partial Gamma DIF Values	RMdifGammaPlot
DIF analysis via Andersen's likelihood-ratio test	RMdifLR
Tree-based DIF analysis with effect-size classification	RMdifTree
Observed one-factor CFA fit and loadings vs a simulated reference	RMdimCFA
Simulated null distribution for one-factor CFA fit and loadings under PCM unidimensionality	RMdimCFACutoff
Plot observed CFA fit and loadings against the simulated null	RMdimCFAPlot
Martin-Löf Test of Unidimensionality	RMdimMartinLof
Standardised Residuals from the Joint Subscore Distribution	RMdimMartinLofResiduals
PCA of Standardized Rasch Residuals	RMdimResidualPCA
Simulation-based Cutoff for First-Contrast Eigenvalue	RMdimResidualPCACutoff
Item Category Probability Curves	RMitemCatProb
Item-Threshold Hierarchy Plot	RMitemHierarchy
Conditional Item Characteristic Curves	RMitemICCPlot
Conditional Item Infit MSQ	RMitemInfit
Simulation-Based Infit MSQ Cutoff Determination	RMitemInfitCutoff
Simulation-Based Infit MSQ Cutoff Determination for Multiply Imputed Data	RMitemInfitCutoffMI
Conditional Item Infit MSQ for Multiply Imputed Data	RMitemInfitMI
Plot Distribution of Simulated Infit and Outfit MSQ Values	RMitemInfitCutoffPlot RMitemInfitPlot
Item Parameters for a Rasch / Partial Credit Model	RMitemParameters
Item Restscore Analysis	RMitemRestscore
Bootstrap Item-Restscore Misfit Detection	RMitemRestscoreBoot
Simulation-Based Item-Restscore Null Distribution	RMitemRestscoreCutoff
Plot the Simulated Item-Restscore Null Distribution	RMitemRestscorePlot
Partial Gamma Local Dependence Analysis	RMlocdepGamma
Simulation-Based Partial Gamma LD Cutoff Determination	RMlocdepGammaCutoff
Plot Distribution of Simulated Partial Gamma LD Values	RMlocdepGammaPlot
Q_3 Residual Correlations for Local Dependence Assessment	RMlocdepQ3
Simulation-Based Q_3 Cutoff Determination	RMlocdepQ3Cutoff
Plot Distribution of Simulated Q_3 Residual Correlations	RMlocdepQ3Plot
Single-subject change between two occasions	RMpersonChange
Person-Fit Statistics for a Rasch / Partial Credit Model	RMpersonFit
Person Locations for a Rasch / Partial Credit Model	RMpersonParameters
Item Response Distribution Bar Chart	RMplotBar
Stacked Bar Chart of Item Response Distributions	RMplotStackedbar
Tile Plot of Item Response Distributions	RMplotTile
Reliability metrics for a Rasch model	RMreliability
Conditional measurement precision across the latent scale	RMreliabilityCurve
Occasion-to-occasion SD from a test-retest study	RMretestSD
Raw-Score to Logit Score Transformation Table	RMscoreSE
Person-Item Targeting Plot (Wright Map)	RMtargeting
Relative Measurement Uncertainty (RMU)	RMUreliability

Package: easyRasch2 1.4.0

easyRasch2: Psychometric Analysis with Rasch Measurement Theory

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