Supplementary material for: The meta-plot: A graphical tool for interpreting the results of a meta-analysis

Supplementary materials for: van Assen, M. A. L. M., van den Akker, O. R., Augusteijn, H. E. M., Bakker, M., Nuijten, M. B., Olsson-Collentine, A., Stoevenbelt, A. H., Wicherts, J. M., & van Aert, R. C. (2023). The Meta-Plot. A Graphical Tool for Interpreting the Results of a Meta-Analysis. Zeitschrift für Psychologie, 231(1), 65-78. https://doi.org/10.1027/2151-2604/a000513 The meta-plot is a descriptive visual tool for meta-analysis that provides information on the primary studies in the meta-analysis and the results of the meta-analysis. More precisely, the meta-plot portrays (1) the precision and statistical power of the primary studies in the meta-analysis, (2) the estimate and confidence interval of a random-effects meta-analysis, (3) the results of a cumulative random-effects meta-analysis yielding a robustness check of the meta-analytic effect size with respect to primary studies’ precision, and (4) evidence of publication bias. After explaining the underlying logic and theory, the meta-plot is applied to two cherry-picked meta-analyses that appear to be biased and to 10 randomly selected meta-analyses from the psychological literature. We recommend accompanying any meta-analysis of common effect size measures with the meta-plot. peerReviewed publishedVersion