R Observatory: Metrics for transDIF version 0.2.0

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

transDIF

0.2.0Package record

Score Comparability for Translated and Adapted Exams

0packages depend

238downloads / year

92.0%test coverage

13/13flavors OK

Overview

About

Maintained by Daniel EdiCRAN page ↗GitHub ↗Website ↗Issues ↗

An adaptation-comparability workflow for small, lower-scoring and unbalanced language groups where standard differential item functioning (DIF) tools (Magis, Beland, Tuerlinckx and De Boeck, 2010, doi:10.3758/BRM.42.3.847) break down. Calibrates the Rasch model in each language group, links the groups robustly through the densest cluster of items rather than assuming DIF cancels out (on anchor selection see Kopf, Zeileis and Strobl, 2015, doi:10.1177/0013164414529792), detects small-sample DIF with an empirical-Bayes spike-and-slab model and local false discovery rates (Efron, 2004, doi:10.1198/016214504000000089), quantifies whether item-level DIF accumulates into different pass rates, explains DIF by item features to give translators actionable guidance, and drafts a comparability report.

Changes in 0.2.0

New td_sensitivity(): how comparability conclusions depend on the linking assumption. Reports the ability difference, number of flagged items and pass-rate impact under mode, purified and all-item linking; a parametric bootstrap of the mode's stability; the items whose DIF verdict depends on the linking; and an overall robust/sensitive verdict. Motivated by the First International Mathematics Study illustration, where pervasive DIF on a short test left the linking unidentified.
td_report() gains a sensitivity argument that adds this analysis to the comparability report.
td_dif() gains c_fixed and c_se_fixed to fit the DIF model under an analyst-chosen linking.

From NEWS.md in the release

Install

R (CRAN)pak (dev)Fedora (COPR)openSUSE (OBS)

install.packages("transDIF", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("edidatasolutions/transDIF")

Development version from edidatasolutions/transDIF. Installs pak first if it is not already available.

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-transDIF

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-transDIF

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed). We list this channel from recorded autoCRAN download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

Health

CRAN checks

13OK

CRAN check page ↗

Slowest check: 1.7 min · r-release-macos-x86_64

Status changes

OK13 OKNow
OK3 OK2026-10-08

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.2.0

READMEYes · 797 wordsVignettesYes · 1 · dynamicNEWSYes · 100% structured · mentions 0.2.0Citation fileNoWebsiteYes · pkgdown

Help pages: 8
Examples that run: 100%8 run in a plain check
Exported functions with examples: 100%
Documented parameters: 82%
Return-value docs: 100%
Help pages citing references: 0%

Vignettes (1)

Comparability of translated exam forms HTML

How these are measured

Downloads

238

CRAN downloads in the past year

Rank #25,439 · ~1/day · ~20/mo

transDIF Releases R versions

Daily download trend is not available in this view yet.

23830 days

23890 days

2381 year

Compare downloads with other packages →

How downloads are counted

Repository

edidatasolutions/transdif ↗Account: edidatasolutions

0Stars

0Forks

0Open issues

0Open PRs

0Releases

Last activity 2026-10-21 · Default branch at 0.2.0.9000, ahead of CRAN 0.2.0 (checked 2026-10-22)

Responsiveness

not measured

How these are measured

PracticesBeta

7 development-tooling and community-health practices detected across 4 families in the upstream repository

Checks run against github.com/edidatasolutions/transdif on 2026-10-22.

Continuous integration (2)

GitHub ActionsR CMD check workflow

The R CMD check workflow runs on Linux, macOS and Windows, and on R-devel

Governance and community (1)

Contributing guide

Docs source (3)

pkgdown

GitHub Pages site last deployed 2026-10-21 · The repository has a site deploy workflow

pkgdown site last built 2026-10-21

CRAN release process (1)

cran-comments.md

How this is detected·Detection ruleset v4 (2026-10-20)

AI coding toolsBeta

This repository shows signs of AI coding tools.

Claude Codefirst seen 2026-10-08
Commits: at least 4 crediting it in the message

Models named in its commits

Claude Opus 5.54 commits · Oct 2026

Counts are commits, not lines of code. Commits by a tool's accounts count once across all of its accounts. Commits crediting it are the largest count among its credit lines, a minimum.How this is detected·Detection ruleset v4 (updated 2026-09-27)

Dependencies

Declared dependencies

2 external dependencies (excludes base and recommended)

Installing transDIF adds no packages beyond those that come with R.

Depends (1)

R >= 4.1

Imports (1)

stats

LinkingTo (0)

none

Suggests (2)

knitr markdown

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

How these are counted

Code & Tests

People & History

People (1)

Daniel Edi

Releases (2)

Pick two releases to compare their code metrics.

0.2.0Latest
record
2026-10-21 · current release · diff ↗ ·
added 1 export
td_sensitivity
0.1.0
record
2026-10-08 ·
4 days in CRAN's queue
Listed in CRAN's incoming queue from 2026-10-03 21:57 to 2026-10-08 06:53 UTC, in 20 readings.
R
R 4.6.0 released · 2026-04-24

Across CRAN, the median accepted release of the past year spent 23 hours in the queue, 90% under 11 days.How queue time is measured

Package metadata

First published: 2026-10-08
Total releases: 2 / 1 yrs
License: MIT + file LICENSE OSI
Minimum R: ≥ 4.1
Download size: 33 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("transDIF")

Format

Edi, D. (2026). transDIF: Score Comparability for Translated and Adapted Exams (Version 0.2.0) [Computer software]. https://doi.org/10.32614/CRAN.package.transDIF

This package has no citation file, so citation() returns this entry built from DESCRIPTION.

Cite the R Observatory

For a number measured here: a download total, a coverage figure, an archival date.

Format

APA

Balamuta, J. J. (2026). R Observatory: Metrics for transDIF version 0.2.0 [Data set]. HJJB, LLC. Data release v2026-10-23. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-23, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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