The pkgdown website for this project is located at https://r-packages.gitlab.io/metabefor.
In systematic reviews, extracting data from primary sources is a crucial step with a high potential for introduction of biases. This package facilitates specification of R extraction scripts that are simultaneously human- and machine-readable. In addition, they are modular and extensible, lending themselves well to living reviews where insights as to optimal extraction evolve over time. By being R Markdown script files, they are optimally transparant, and their structure was designed to also be accessible to readers without R. Finally, each extraction script contains the original specification, enabling bootstrapping new specifications from each single extraction script.
Originally, the package was intended to help with everything that needs to be done before the metafor package can be used, hence the name. Since then, the metaverse was born, with dedicated packages for specific stages, such as developing search strategies, working with bibliographic data, and visualisation. Presently, therefore,
metabefor mostly covers extraction.
Depending on your situation there are three places to get started.
If you’re already familiar with systematic reviews and evidence synthesis, you may want to start with NITRO, the Narrated Illustration of a Transparent Review Outline. This is somewhat of a worked example, available at https://sci-ops.gitlab.io/narrated-illustration-of-a-transparent-review-outline.
Second, if you’re relatively new to systematic reviews, you may want to start with the SysRevving book, available at https://sysrevving.com. This living open access book is intended as a general resource on conducting systematic reviews, built around
Third, if you’re already using
metabefor, you may just want to consult the manual as included with the package. From within R, each function’s manual page can be displayed by prepending the function name with a question mark (e.g.
?metabefor::rxs_fromSpecifications. Alternatively, the index of functions is available at the
metabefor PkgDown site http://r-packages.gitlab.io/metabefor.
Finally, in any case you may want to keep the glossary of terms ready. This is located at https://sysrevving.com/glossary.
You can install the released version of
metabefor from CRAN with:
You can install the development version of
metabefor from GitLab with:
(assuming you have
remotes installed; otherwise, install that first using the
For an extensive resource about effect size computation and conversion, see https://mgto.org/effectsizepowerguide.