Package: iarm 0.4.3

iarm: Item Analysis in Rasch Models

Tools to assess model fit and identify misfitting items for Rasch models (RM) and partial credit models (PCM). Included are item fit statistics, item characteristic curves, item-restscore association, conditional likelihood ratio tests, assessment of measurement error, estimates of the reliability and test targeting as described in Christensen et al. (Eds.) (2013, ISBN:978-1-84821-222-0).

Authors:Marianne Mueller [aut, cre], Pedro Henrique Ribeiro Santiago [ctb]

iarm_0.4.3.tar.gz
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iarm.pdf |iarm.html✨
iarm/json (API)
NEWS

# Install 'iarm' in R:

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

Bug tracker:https://github.com/muellermarianne/iarm/issues

Datasets:

amts - Abbreviated Mental Test Score
desc2 - Depression Screening DESC-II

On CRAN:

2.97 score 3 stars 31 scripts 212 downloads 1 mentions 13 exports 93 dependencies

Last updated 3 years agofrom:a7ed8b8d11. Checks:9 OK. Indexed: yes.

Target	Result	Latest binary
Doc / Vignettes	OK	Mar 31 2025
R-4.5-win	OK	Mar 31 2025
R-4.5-mac	OK	Mar 31 2025
R-4.5-linux	OK	Mar 31 2025
R-4.4-win	OK	Mar 31 2025
R-4.4-mac	OK	Mar 31 2025
R-4.4-linux	OK	Mar 31 2025
R-4.3-win	OK	Mar 31 2025
R-4.3-mac	OK	Mar 31 2025

Exports:boot_fit clr_tests ICCplot item_obsexp item_restscore item_target out_infit partgam partgam_DIF partgam_LD person_estimates score_groups test_prop

Dependencies:backports base64enc bslib ca cachem cellranger checkmate cli cluster colorspace cpp11 crayon data.table digest dplyr eRm evaluate fansi farver fastmap fontawesome foreign Formula fs generics ggplot2 glue gnm GPArotation gridExtra gtable here highr Hmisc hms htmlTable htmltools htmlwidgets isoband jquerylib jsonlite knitr labeling lattice lifecycle lmtest magrittr MASS Matrix memoise mgcv mime mnormt munsell nlme nnet pillar pkgconfig prettyunits progress psych psychotools purrr qvcalc R6 rappdirs RColorBrewer readxl relimp rematch rlang rmarkdown rpart rprojroot rstudioapi sass scales stringi stringr tibble tidyr tidyselect tinytex utf8 vcd vcdExtra vctrs viridis viridisLite withr xfun yaml zoo

Citation

Development and contributors

Readme and manuals

Help Manual

Help page	Topics
iarm: A package for item analysis in Rasch models	iarm-package iarm
Abbreviated Mental Test Score (AMTS)	amts
Computes Bootstrapping P Values for Outfit and Infit Statistics	boot_fit
Conditional Likelihood Ratio Tests (CLR)	clr_tests
Depression Screening DESC-II	desc2
Item Characteristic Curves	ICCplot
Observed and Expected Item Mean Scores	item_obsexp
Item Restscore Association	item_restscore
Computation of Item Targets for Polytomous Models	item_target
Item Outfit and Infit Statistics	out_infit
Conditional and Partial Gamma Coefficients	partgam
Partial Gamma to detect Differential Item Functioning (DIF)	partgam_DIF
Partial Gamma to detect Local Dependence (LD)	partgam_LD
Person Estimates with MLE and WLE	person_estimates
Print Method for the Output of boot_fit	print.bootfit
Print Method for the Output of out_infit	print.outfit
Generate two Score Groups	score_groups
Properties of the Test	test_prop