Attacks fitted R model claims by searching for small plausible perturbations that make a target result disappear. The package focuses on claim-level fragility, smallest-kill reporting, and reproducible caveated robustness checks for ordinary fitted model objects. The methods draw on the fragility-index concept of Walsh et al. (2014) <doi:10.1016/j.jclinepi.2013.10.019>, multiverse analysis of Steegen et al. (2016) <doi:10.1177/1745691616658637>, specification-curve analysis of Simonsohn et al. (2020) <doi:10.1038/s41562-020-0912-z>, and robust covariance estimation of Zeileis (2004) <doi:10.18637/jss.v011.i10>.
| Version: | 1.0.0 |
| Depends: | R (≥ 4.1) |
| Imports: | cli, ggplot2, parallel, rlang, stats, tibble, vctrs |
| Suggests: | broom, knitr, lme4, lmtest, rmarkdown, rstudioapi, sandwich, shiny, survival, testthat (≥ 3.0.0) |
| Published: | 2026-08-07 |
| DOI: | 10.32614/CRAN.package.falsifyr (may not be active yet) |
| Author: | Markuss Saule [aut, cre, cph] |
| Maintainer: | Markuss Saule <markusstomas at gmail.com> |
| BugReports: | https://github.com/msaule/falsifyr/issues |
| License: | MIT + file LICENSE |
| URL: | https://github.com/msaule/falsifyr, https://msaule.github.io/falsifyr/ |
| NeedsCompilation: | no |
| Language: | en-US |
| Materials: | README, NEWS |
| CRAN checks: | falsifyr results |
| Reference manual: | falsifyr.html , falsifyr.pdf |
| Vignettes: |
Attacking a Regression Claim (source, R code) Interpreting Survival Scores (source, R code) |
| Package source: | falsifyr_1.0.0.tar.gz |
| Windows binaries: | r-devel: not available, r-release: not available, r-oldrel: not available |
| macOS binaries: | r-release (arm64): not available, r-oldrel (arm64): not available, r-release (x86_64): not available, r-oldrel (x86_64): not available |
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