metafor-project.org

The metafor Package is a comprehensive, free, and open-source tool designed for performing meta-analyses within the R statistical software environment. Developed by Wolfgang Viechtbauer, this package equips users with a robust collection of functions that facilitate the calculation of various effect sizes and outcome measures. It supports fitting for multiple models, including equal-, fixed-, random-, and mixed-effects, and offers capabilities for conducting moderator and meta-regression analyses.

On the metafor website, users can find a wealth of resources including news about the package, detailed descriptions of its features, a comprehensive update log, and a to-do list outlining planned enhancements. Additionally, the site provides essential information on downloading, installing, and utilizing the package, alongside practical analysis examples and illustrative plots. Users will also benefit from tips, a FAQ section, and links to related meta-analysis software resources. The metafor package is licensed under the GNU General Public License Version 2, ensuring its availability for both personal and academic use.