Understanding meta-analysis through data simulation with applications to power analysis

This repository contains the code to reproduce the analysis of the paper Understanding meta-analysis through data simulation with applications to power analysis by Gambarota Filippo and Gianmarco Altoè. The project can also be found on the Open Science Framework https://osf.io/54djn/ with a preprint uploaded on PsyArXiv https://psyarxiv.com/br6vy/.

Usage

Functions used in the paper and supplementary materials are documented and can be used opening the simulating-meta-analysis.Rproj file and using the devtools::load_all() function (this requires the devtools package installed). Then each function will be available as using a standard R package.

Documents

The repository (documents/ folder) contains the paper and supplementary materials created using R Markdown and the papaja package.

Document	Rendered	Source
Paper	pdf	rmd
Supplementary Materials	pdf	rmd

Repository

The project is organized as follows:

• R: contains the simulation and utility functions used in the paper and the supplementary materials
• documents: contains the .Rmd files to reproduce the paper and supplementary materials manuscripts
• scripts: contains the script used to produce complex objects and figures
  • scripts\r-img.R: create the paper figures. Figures that are not created in this script using ggplot2 are created with the open-source program Inkscape and contained in the **/img/ folder.
• objects: contains the result of objects created by the scripts/ scripts.

Testing

The custom functions are tested within the scripts/test.R script. The idea is to use the same simulation codes of the paper increasing the $k$ and $n$ values and check the recovery of simulated parameters using the check_sim() function.

Session

Session info

#> version: R version 4.3.1 (2023-06-16 ucrt)
#> os: Windows 10 x64 (build 19045)
#> system: x86_64, mingw32
#> ui: RTerm
#> language: (EN)
#> collate: English_United States.utf8
#> ctype: English_United States.utf8
#> tz: Europe/Rome
#> pandoc: 3.1.1 @ C:/Program Files/RStudio/resources/app/bin/quarto/bin/tools/ (via rmarkdown)

Packages

• dplyr (1.1.2)
• tidyr (1.3.0)
• ggplot2 (3.4.2)
• metafor (4.2.0)
• MASS (7.3.60)
• cli (3.6.1)
• rmarkdown (2.23)
• papaja (0.1.1)
• knitr (1.43)
• devtools (2.4.5)
• here (1.0.1)
• kableExtra (1.3.4.9000)
• latex2exp (0.9.6)
• ltxplot (1.0.0)
• tibble (3.2.1)
• ggExtra (0.10.0)
• ggthemes (4.2.4)
• gridExtra (2.3)
• purrr (1.0.2)
• bookdown (0.35)
• broom (1.0.5)
• renv (1.0.1)
• stringr (1.5.0)
• simulatingMeta (1.0.0)
• sessioninfo (1.2.2)
• cowplot (1.1.1)
• distributional (0.3.2)
• ggdist (3.3.0)
• tidyverse (2.0.0)