Indices of Effect Size
Overview
Provide utilities to work with indices of effect size for a wide variety of models and hypothesis tests (see list of supported models using the function 'insight::supported_models()'), allowing computation of and conversion between indices such as Cohen's d, r, odds, etc. References: Ben-Shachar et al. (2020) doi:10.21105/joss.02815.
Bug fixes
eta_squared(<afex> / <Anova.mlm>)with partially overlapping factor names now return correct effect sizes ( #697 )
From NEWS.md in the release
Install
Health
NOTER code for possible problemsr-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
Found calls to structure() using deprecated special names: effectsize/tests/testthat/test-format_standardize.R (.Label: 4) '.Label' should be changed to 'levels'.
NOTERd contentsr-devel-linux-x86_64-debian-clang, r-devel-linux-x86_64-debian-gcc
Rd files without \usage: ‘effectsize_deprecated.Rd’ \arguments should not be documented without \usage.
- NOTE8 OK, 5 NOTE2026-09-25
- WARNING7 OK, 5 NOTE, 1 WARNING2026-09-18
- NOTE12 OK, 1 NOTE2026-07-11
- OK13 OK2026-07-08
- ERROR11 OK, 1 ERROR2026-04-25
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- OK14 OK2026-03-14
- ERROR9 OK, 5 ERROR2026-03-10
Documentation
- Help pages
- 61 (2 internal)includes a package overview page
- Examples that run
- 90%37 run in a plain check (7 of them under a condition) · 4 only when donttest examples are enabled (R CMD check --as-cran)
- Exported functions with examples
- 87%
- Documented parameters
- 79%
- Return-value docs
- 50%
- Help pages citing references
- 61%
- Effect Sizes: Getting Started
- Automated Interpretation of Indices of Effect Size
- Converting Between Probabilities, Odds (Ratios), and Risk Ratios
- Converting Between r, d, and Odds Ratios
- Effect Size from Test Statistics
- Effect Sizes for ANOVAs
- Effect Sizes for Contingency Tables
- Standardized Differences
- Statistical Power
- Support Functions for Model Extensions
Downloads
Repository
- PRs merged (all time)
- 93%
- Median days to close, 50 most recently updated closed issues
- 2
- Median days to close, 50 most recently updated closed PRs
- 2
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19 development-tooling and community-health practices detected across 8 families in the upstream repository
Checks run against github.com/easystats/effectsize on 2026-10-22.
Funding links: GitHub Sponsors
The repository owner accepts GitHub Sponsors
GitHub Pages site last deployed 2026-10-18
pkgdown site last built 2026-10-18
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This repository shows signs of AI coding tools.
- GitHub Copilotfirst seen 2025-11-16Pull request: opened by its own accountCommits: 1 by its own account · at least 1 crediting it in the message
Dependencies
Installing effectsize adds 5 packages (0 with compiled code, 4.8 MB of source tarballs). Heaviest: performance 1.9 MB, insight 1.2 MB, parameters 701 KB.
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Code & Tests
Datasets
People & History
Previously maintained by Dominique Makowski (0.0.1 to 0.2.0).
Pick two releases to compare their code metrics.
- 1.0.3Latest
- RR 4.6.0 released · 2026-04-24
- 1.0.22026-03-11 · diff ↗ ·
removed 8 exports
convert_d_to_oddsratio, convert_d_to_r, convert_odds_to_probs, convert_oddsratio_to_d, convert_oddsratio_to_r, convert_probs_to_odds, convert_r_to_d, convert_r_to_oddsratioadded 5 exports
arr_to_probs, logoddsratio_to_probs, nnt_to_probs, oddsratio_to_probs, riskratio_to_probs - 1.0.12025-05-27 · diff ↗
- RR 4.5.0 released · 2025-04-11
- 1.0.02024-12-10 · diff ↗ ·
removed 14 exports
chisq_to_normalized, cles, common_language, convert_d_to_common_language, convert_rb_to_common_language, d_to_cles, d_to_common_language, interpret_d, interpret_delta, interpret_g, interpret_parameters, normalized_chi, rb_to_cles, rb_to_common_language - 0.8.92024-07-03 · diff ↗
- 0.8.82024-05-12 · diff ↗
- RR 4.4.0 released · 2024-04-24
- 0.8.7
- 0.8.62023-09-14 · diff ↗
- 0.8.52023-08-09 · diff ↗ ·
removed 2 exports
convert_logoddsratio_to_d, convert_logoddsratio_to_radded 31 exports
arr, arr_to_logoddsratio, arr_to_nnt, arr_to_oddsratio, arr_to_riskratio, c_to_w, d_to_logoddsratio, fei_to_w, interpret_r2_semipartial, logoddsratio_to_arr, logoddsratio_to_nnt, logoddsratio_to_riskratio, nnt, nnt_to_arr, nnt_to_logoddsratio, nnt_to_oddsratio, nnt_to_riskratio, oddsratio_to_arr, oddsratio_to_nnt, r_to_logoddsratio, riskratio_to_arr, riskratio_to_logoddsratio, riskratio_to_nnt, t_to_v, t_to_w, v_to_t, v_to_w, w_to_c, w_to_fei, w_to_t and 1 more - RR 4.3.0 released · 2023-04-21
- 0.8.3
- 0.8.22022-10-31 · diff ↗
- 0.8.12022-10-18 · diff ↗
Show 23 earlier eventsHide 23 earlier events
- 0.8.02022-10-09 · diff ↗ ·
added 19 exports
chisq_to_fei, chisq_to_tschuprows_t, cohens_u1, cohens_u2, cov_pooled, d_to_overlap, d_to_p_superiority, d_to_u1, d_to_u2, d_to_u3, fei, mahalanobis_d, rank_eta_squared, rb_to_p_superiority, rb_to_vda, rb_to_wmw_odds, tschuprows_t, vd_a, wmw_odds - 0.7.0.52022-08-10 · diff ↗
- 0.7.02022-05-26 · diff ↗ ·
removed 5 exports
adjust, change_scale, normalize, ranktransform, unstandardizeadded 6 exports
chisq_to_normalized, display, normalized_chi, print_html, print_md, standardise - RR 4.2.0 released · 2022-04-22
- 0.6.0.12022-01-26 · diff ↗
- 0.6.02022-01-14 · diff ↗ ·
added 12 exports
.es_aov_simple, .es_aov_strata, .es_aov_table, cles, cohens_u3, common_language, convert_rb_to_common_language, d_to_cles, p_overlap, p_superiority, rb_to_cles, rb_to_common_language - 0.52021-10-04 · diff ↗ ·
removed 12 exports
convert_d_to_odds, convert_odds_to_d, convert_odds_to_r, convert_r_to_odds, d_to_odds, data_adjust, interpret_odds, logodds_to_d, logodds_to_r, odds_to_d, odds_to_r, r_to_oddsadded 13 exports
chisq_to_pearsons_c, get_effectsize_name, interpret_cohens_d, interpret_cohens_g, interpret_cramers_v, interpret_glass_delta, interpret_hedges_g, interpret_icc, interpret_pd, interpret_phi, interpret_rank_biserial, interpret_vif, pearsons_c - 0.4.5
- RR 4.1.0 released · 2021-05-18
- 0.4.4-12021-04-05 · diff ↗
- 0.4.4
- 0.4.32021-01-18 · diff ↗ ·
added 11 exports
cliffs_delta, cohens_h, data_adjust, eta2_to_f, eta2_to_f2, f2_to_eta2, f_to_eta2, get_effectsize_label, kendalls_w, rank_biserial, rank_epsilon_squared - 0.4.1
- 0.4.02020-10-25 · diff ↗ ·
added 11 exports
F_to_f2, chisq_to_cohens_w, cohens_f_squared, cohens_g, cohens_w, interpret_epsilon_squared, interpret_eta_squared, interpret_oddsratio, oddsratio_to_riskratio, riskratio_to_oddsratio, t_to_f2 - 0.3.32020-09-17 · diff ↗ ·
removed 8 exports
convert_d_to_percentage, convert_percentage_to_d, convert_percentile_to_z, convert_z_to_percentile, d_to_percentage, percentage_to_d, percentile_to_z, z_to_percentileadded 12 exports
convert_d_to_common_language, convert_d_to_oddsratio, convert_oddsratio_to_d, convert_oddsratio_to_r, convert_r_to_oddsratio, d_to_common_language, d_to_oddsratio, logoddsratio_to_d, logoddsratio_to_r, oddsratio_to_d, oddsratio_to_r, r_to_oddsratio - 0.3.2
- 0.3.12020-05-19 · diff ↗ ·
removed 9 exports
convert_F_to_d, convert_F_to_r, convert_chisq_to_cramers_v, convert_chisq_to_phi, convert_phi_to_chisq, convert_t_to_d, convert_t_to_r, convert_z_to_d, convert_z_to_radded 2 exports
equivalence_test, is_effectsize_name - RR 4.0.0 released · 2020-04-24
- 0.3.02020-04-11 · diff ↗ ·
removed 9 exports
convert_posteriors_to_r, convert_posteriors_to_t, convert_r_to_t, convert_r_to_z, eta_squared_adj, posteriors_to_r, posteriors_to_t, r_to_t, r_to_zadded 5 exports
F_to_f, cramers_v, effectsize, phi, t_to_f - 0.2.02020-02-25 · diff ↗
- 0.1.12020-01-27 · diff ↗ ·
removed 1 export
.sd_pooledadded 5 exports
convert_r_to_t, convert_r_to_z, eta_squared_adj, r_to_t, r_to_z - 0.0.12019-11-15
- RR 3.6.0 released · 2019-04-26
Package metadata
- First published
- 2019-11-15
- Total releases
- 31 / 7 yrs
- License
- MIT + file LICENSE OSI · relicensed from GPL-3 in 0.8.7
- Minimum R
- ≥ 4.0
- Bundled data
- 16 KB / 9 files
- Download size
- 387 KB
Cite
Cite this package
Run in R for the authors' entry:
citation("effectsize")The package provides a citation file, so citation() returns the authors' own entry.
It points to 10.21105/joss.02815.
Cite the R Observatory
For a number measured here: a download total, a coverage figure, an archival date.
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.