Andreas Brandmaier
@brandmaier
Research Methods. Multivariate Models. Individual differences. Lifespan. Reproducibility. R. Views are my own but you can keep them.
Cohen’s d is one of the most widely used ways to communicate mean differences across studies. But what, exactly, is it telling us? A perspective on detectability of effects -- just out in PARE: openpublishing.library.umass.edu/pare/article... #openaccess
Anke Schneider and I put together a short brochure on sample size planning, aimed at Bachelor psychology students. Our goal: help students justify their sample size plan (other than just relying on defaults) and help avoid common pitfalls. 🚀 For now, it’s only available in German. osf.io/n46vg/
Not exactly 'low quality,' but a brilliant example of how correlational findings can start to take on a life of their own. The paper title is "Socioeconomic position and the risk of brain tumour" but see the Mirror's headline. Original paper: jech.bmj.com/content/70/1...
New preprint: Stop thinking of Cohen's d as an effect size. Cohen's d confounds magnitude of effect and reliability. Yet, we pretend our measurements are flawless when interpreting it. What if we thought of Cohen’s d as a measure of detectability instead? osf.io/preprints/ps...
Want automated reproducibility checks for your R Markdown docs on GitHub? reproducibleRchunks v1.2.0 is now on CRAN! ✅ Generates GitHub Actions for cloud-based reproducibility checks (with cool badges) 📦 Supports renv for dependency management 👉 cran.r-project.org/package=repr...
Finally: Ecologically valid MRI studies. Seen at Max Planck Campus of Cognition #noai
Out now in Collabra: Psychology: Automated Reproducibility Testing in R Markdown. The R package reproducibleRchunks, which stores metadata about original computational results and verifies later reproduction attempts automatically. online.ucpress.edu/collabra/art...
You want to fit structural equation models in Julia? No problem with the StructuralEquationModels.jl package. Ships with worked examples and tutorials on how to modify the objective function easily (e.g., adding a regularization penalty). Find our preprint here osf.io/preprints/ps...
Upcoming at #DAGStat2025 in Berlin at 5:20pm today: "Focus! SEM Trees and Forests for Identifying Moderators in Structural Equation Models" My slides are here: github.com/brandmaier/f...
Updated Preprint: Are you looking for automated reproducibility checks in R Markdown? Just rename your code chunks from 'R' to 'reproducibleR' with our pkg #rstats cran.r-project.org/web/packages... More in our preprint (under review): osf.io/preprints/ps... We are looking forward to your feedback!
Are you looking for automated reproducibility checks with minimal effort in R/Rstudio? Our package reproducibleRchunks is now on CRAN. All it takes is to rename your R Markdown chunks from 'R' to 'reproducibleR' #rstats cran.r-project.org/web/packages... More in our preprint: osf.io/preprints/ps...
Here is a regular reminder of my deconstructR package, which offers self-destructing plots in R (gravity plot, black hole plot, ...). You'll find the sources here: github.com/brandmaier/d... No need to thank me. And here is a gravity plot attached. #rstats #academicsky #phdsky
Here is John Alexander Silva Díaz's latest simulation study on how SEM forest perform finding omitted influential covariates in a SEM: www.tandfonline.com/doi/full/10.... (image: CC4.0 by the original authors)
Out now (open access): Optimal two-time point longitudinal models for estimating individual-level change: Asymptotic insights and practical implications; work with brilliant @emccormick.bsky.social www.sciencedirect.com/science/arti...
Verify research reproducibility! 📊Here is our game-changing package for R Markdown. Automatically track meta data about your computational results and verify later reproductions. Say goodbye to irreproducible research gone unnoticed! Preprint: osf.io/preprints/ps... 🚀 #Rstats
New version of R package semtree now on CRAN: cran.r-project.org/web/packages... featuring leaner package imports.
When you publish on random forests and get invited to a Forestry journal
It's 2024 and submission to a journal requires(!) a fax number in an online system. I will totally select this as preferred method of contact.
Materials to our workshop on scientific data visualization with R/shiny are freely available here github.com/brandmaier/s...
Our latest preprint with Ulman Lindenberger and Ethan McCormick (@emccormick.bsky.social) on "Optimal Two-Time Point Longitudinal Models for Estimating Individual-Level Change: Asymptotic Insights and Practical Implications". Enjoy at OSF: osf.io/3g2z6/
Here is an early christmas present: Our free structural equation modeling tool Onyx is finally open source: github.com/brandmaier/o...
Here is your regular service announcement that making data analyses reproducible is hard (mostly because your past self doesn't reply to emails). Here is our suggestion how to make your R scripts reproducible for your future self and others: www.mdpi.com/2624-8611/3/...
The semtree package for R has a new CRAN release featuring speed ups, bug fixes and fewer dependencies : cran.r-project.org/web/packages...
I just came across this neat little generator for (python-based) research projects, which sets up a standardized tree structure shescher.github.io/scilaunch/