Wolfgang Viechtbauer

… to my website. Below you can find my contact information and office address (with directions). In case you are wondering who the heck I am, you could consider reading my (not so really) short profile.

On this site, you can also find my curriculum vitae, a list of my publications and presentations, links to some software I (co)authored, and information about a number of courses I teach on a semi-regular basis (e.g., a meta-analysis course, an introduction to R course, and an ESM data analysis course). I also do regular live streams on R and statistics in case you are into that sort of thing.

You might also be here because of the metafor package (a free and open-source add-on for conducting meta-analyses with the statistical software environment R), which I am the author of. More information about the package and its ongoing development can be found on the metafor package website. If you need help with using the package, see here.

2026-03-04: I was just informed that I am one of the two recipients of the EAM (European Association of Methodology) Distinguished Award in Methodological Open Source Software Development, for my work on the metafor package. Very honored to receive this award! The other recipient is Yves Rosseel from Ghent University for his work on the (excellent!) lavaan package.

2025-07-03: As part of a symposium on recent advances in meta-analysis at the TU University Dortmund, I just gave a talk about location-scale models for meta-analysis. You can find the slides under my presentations.

2025-06-11: I gave a presentation at the Evidence Synthesis & Meta-Analysis in R Conference (ESMARConf) this morning about different ways to visualize the amount of heterogeneity in a meta-analysis using prediction intervals and predictive distributions. You can find the slides for this presentation (and the code for the examples) here and a video of the presentation here.

2025-05-27: Just a gave a talk about a rather simple method for estimating and testing the correlation between two momentary assessments in ESM/EMA data that accounts for subject-level heterogeneity at the 2025 Conference of the Society for Ambulatory Assessment. You can find the slides under my presentations.