Documentation: See the cofad README for installation, examples, and interpretation guidance.

Problems and suggestions: Please use the GitHub issue tracker.

Data format: Data must be in long format (also called narrow or tidy format). See this short explanation.

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Cite cofad

Henninger, M., Malejka, S., & Titz, J. (2025). Contrast analysis for competing hypotheses: A tutorial using the R package cofad. Behavior Research Methods, 57, Article 326. https://doi.org/10.3758/s13428-025-02833-w Titz, J., & Burkhardt, M. (2021). cofad: An R package and Shiny app for contrast analysis. Journal of Open Source Software, 6(67), 3822. https://doi.org/10.21105/joss.03822 <div class="csl-bib-body"><div class="csl-entry">Henninger, M., Malejka, S., &amp; Titz, J. (2025). Contrast analysis for competing hypotheses: A tutorial using the R package cofad. <i>Behavior Research Methods, 57</i>, Article 326. <a href="https://doi.org/10.3758/s13428-025-02833-w">https://doi.org/10.3758/s13428-025-02833-w</a></div><div class="csl-entry">Titz, J., &amp; Burkhardt, M. (2021). cofad: An R package and Shiny app for contrast analysis. <i>Journal of Open Source Software, 6</i>(67), 3822. <a href="https://doi.org/10.21105/joss.03822">https://doi.org/10.21105/joss.03822</a></div></div> @article{henninger2025cofad, author = {Henninger, Mirka and Malejka, Simone and Titz, Johannes}, title = {Contrast analysis for competing hypotheses: A tutorial using the {R} package cofad}, journal = {Behavior Research Methods}, year = {2025}, volume = {57}, pages = {326}, doi = {10.3758/s13428-025-02833-w} } @article{titz2021cofad, author = {Titz, Johannes and Burkhardt, Markus}, title = {cofad: An {R} package and {Shiny} app for contrast analysis}, journal = {Journal of Open Source Software}, year = {2021}, volume = {6}, number = {67}, pages = {3822}, doi = {10.21105/joss.03822} }