Tools for Behavior Change Researchers and Professionals R package behaviorchange version 25.8.0 CRAN Task View: CausalInference (https://CRAN.R-project.org/view=CausalInference) Contains specialised analyses and visualisation tools for behavior change science. These facilitate conducting determinant studies (for example, using confidence interval-based estimation of relevance, CIBER, or CIBERlite plots, see Crutzen, Noijen & Peters (2017) <doi:10/ghtfz9>), systematically developing, reporting, and analysing interventions (for example, using Acyclic Behavior Change Diagrams), and reporting about intervention effectiveness (for example, using the Numbers Needed for Change, see Gruijters & Peters (2017) <doi:10/jzkt>), and computing the required sample size (using the Meaningful Change Definition, see Gruijters & Peters (2020) <doi:10/ghpnx8>). This package is especially useful for researchers in the field of behavior change or health psychology and to behavior change professionals such as intervention developers and prevention workers. Software Depends: R (>= 3.5.0) Imports: BiasedUrn (>= 1.07), data.tree (>= 0.7.5), DiagrammeR (>= 1.0.0), DiagrammeRsvg (>= 0.1.0), ggplot2 (>= 2.2.1), googlesheets4 (>= 0.2.0), gridExtra (>= 2.3), gtable (>= 0.2.0), knitr (>= 1.0), methods (>= 3.0), rmdpartials (>= 0.5.0), ufs (>= 0.3.2), viridis (>= 0.5.1), yum (>= 0.0.1) Suggests: htmltools, kableExtra, openxlsx, patchwork (>= 1.3.0), png (>= 0.1), rmarkdown, rstudioapi, rsvg, webshot Gjalt-Jorn Peters <behaviorchange@opens.science> Comprehensive R Archive Network (CRAN) Gjalt-Jorn Peters [aut, cre] (ORCID: <https://orcid.org/0000-0002-0336-9589>), Rik Crutzen [ctb] (ORCID: <https://orcid.org/0000-0002-3731-6610>), Jeroen Bruinsma [ctb] (ORCID: <https://orcid.org/0000-0002-7964-0267>), Stefan Gruijters [ctb] (ORCID: <https://orcid.org/0000-0003-0141-0071>) GPL (>= 3) 2025-08-20 application/tgz https://CRAN.R-project.org/package=behaviorchange doi:10.32614/CRAN.package.behaviorchange