Generalized Graded Unfolding Model
Overview
An implementation of the generalized graded unfolding model (GGUM) in R, see Roberts, Donoghue, and Laughlin (2000) doi:10.1177/01466216000241001). It allows to simulate data sets based on the GGUM. It fits the GGUM and the GUM, and it retrieves item and person parameter estimates. Several plotting functions are available (item and test information functions; item and test characteristic curves; item category response curves). Additionally, there are some functions that facilitate the communication between R and 'GGUM2004'. Finally, a model-fit checking utility, MODFIT(), is also available.
Install
Health
NOTERd filesr-devel-linux-x86_64-debian-clang, r-devel-linux-x86_64-debian-gcc, r-devel-linux-x86_64-fedora-clang, r-devel-linux-x86_64-fedora-gcc, r-devel-windows-x86_64, r-oldrel-macos-arm64, r-oldrel-macos-x86_64, r-oldrel-windows-x86_64, r-patched-linux-x86_64, r-release-linux-x86_64, r-release-macos-arm64, r-release-macos-x86_64, r-release-windows-x86_64
checkRd: (-1) MODFIT.Rd:33: Lost braces; missing escapes or markup?
33 | {chisq_i = sum( (O_iz - E_iz)^2 / E_iz; z = 0, ..., C ), }
| ^
checkRd: (-1) probs.GGUM.Rd:27: Lost braces; missing escapes or markup?
27 | GUM-based probabilities just constrain alpha to a unit vector of length {I}
| ^- NOTE13 NOTENow
- NOTE14 NOTE2026-04-06
- ERROR13 NOTE, 1 ERROR2026-04-04
- NOTE14 NOTE2026-03-10
Documentation
- Help pages
- 17includes a package overview page
- Examples that run
- 47%8 run in a plain check · 9 never run
- Exported functions with examples
- 100%
- Documented parameters
- 100%
- Return-value docs
- 94%
- Help pages citing references
- 53% with a bibliography file
Downloads
Repository
- PRs merged (all time)
- 80%
- Median days to close, 50 most recently updated closed issues
- 54
- Median days to close, 50 most recently updated closed PRs
- 6
Stars over time
Forks over time
Issues over time
PRs over time
Checks run against github.com/jorgetendeiro/ggum on 2026-10-21.
No development-tooling practices detected in the upstream repository.
Dependencies
Installing GGUM adds 28 packages (10 with compiled code, 32 MB of source tarballs). Heaviest: xlsxjars 9.8 MB, ggplot2 6.0 MB, viridis 2.9 MB.
Code & Tests
People & History
Pick two releases to compare their code metrics.
- RR 4.6.0 released · 2026-04-24
- RR 4.5.0 released · 2025-04-11
- RR 4.4.0 released · 2024-04-24
- 0.5Latest
- RR 4.3.0 released · 2023-04-21
- RR 4.2.0 released · 2022-04-22
- 0.4-32021-10-07 · diff ↗
- RR 4.1.0 released · 2021-05-18
- 0.4-22021-02-21 · diff ↗
- 0.4-12020-05-18 · diff ↗
- RR 4.0.0 released · 2020-04-24
- 0.42020-01-21 · diff ↗
- RR 3.6.0 released · 2019-04-26
- 0.3.32018-10-04 · diff ↗
- 0.3.22018-07-04 · diff ↗
- RR 3.5.0 released · 2018-04-23
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- 0.3.12018-01-26
- RR 3.4.0 released · 2017-04-21
Package metadata
- First published
- 2018-01-26
- Total releases
- 8 / 8 yrs
- License
- GPL (>= 2) OSI
- Download size
- 81 KB
Cite
Cite this package
Run in R for the authors' preferred citation:
citation("GGUM")This package has no citation file, so citation() returns this entry built from DESCRIPTION.
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