My PhD student @qinyuxiao.bsky.social has written a wonderful tribute to Gary Bornstein’s influential paper on team games (doi.org/10.1207/S153...) — a paper that remains as relevant today as it was over 20 years ago. You can read Qinyu’s short piece here: doi.org/10.1038/s441...

📢 New SysRev + Meta-Analysis out in Health Psychology Review! Together with the amazing Martin Voracek, @corneliabetsch.bsky.social & @robertboehm.bsky.social Do messages about herd immunity increase or decrease vaccination motivation? 🤔 Read more to find out! 🧵 OA: doi.org/10.1080/1743...

🚨 Beyond excited that our new paper is out today in @natureportfolio.nature.com We find that people are more likely to cheat when they delegate to AI than when acting themselves. www.nature.com/articles/s41...

Z-curve plot is a new visual model fit diagnostic for #metaanalysis with an emphasis on #publicationbias. In contrast to funnel plots, z-curve plots - visualize the distribution of z-statistics (where bias usually occurs) - compare the fit of multiple models simultaneously

A shout out for @nrennie.bsky.social fab book on data viz! nrennie.rbind.io/art-of-viz/

"Understanding different types of review articles: A primer for early career researchers." By Ghosh & Choudhury (2025) Open Access: dx.doi.org/10.4103/indi... #AcademicSky #PhDSky #Methodology

Happy to announce ✨quarto-revealjs-editable✨ This fully supersedes the imagemover extension, as I back then didn't realize the potential. You can now also move, resize, change font size and alignment for text in your slides github.com/EmilHvitfeld... #quarto #slidecrafting

Paper drop, for anyone interested in #metascience, #statistics, or #metaanalysis! @clintin.bsky.social and I show in a new paper in JASA that the P-curve, a popular forensic meta-analysis method, has deeply undesirable statistical properties. www.tandfonline.com/doi/full/10.... 1/?

New blog post: Easily download files from the Open Science Framework with Papercheck daniellakens.blogspot.com/2025/07/easi... Downloading all files in an OSF project can be a hassle. Not anymore, with Papercheck! Just run: osf_file_download("6nt4v")

Awesome reading list!

{ralger} #rstats package looks like an absolute game changer in the task of web scraping for people with very occasional need in this rather nerdy task 🤩 Instead of drilling manually through cached HTML, one can use intuitively named functions that just do it ✨ 🔗 feddelegrand7.github.io/ralger/

An AI model (Llama 3.1 70B) fine-tuned on the results of 60,000 people in psychology experiments shows some real promise in using LLMs for studying and predicting human behavior. It predicts actual human behavior in held-out data & it generalizes to out-of-distribution tasks and experiments.

Just a reminder that #ESMARConf2025 is starting tomorrow! This is a free online conference about evidence synthesis and meta-analysis using #Rstats. Further details can be found here: esmarconf.org/2025/

🚨New paper!🚨 Meta-analysis on 4M p-values across 240k psych articles: How has psychology changed since the replication crisis began? How is replicability linked to citations, impact factor, and university prestige? 🧵 Paper: journals.sagepub.com/doi/10.1177/... Interactive: pbogdan.com/meganal

Ende einer Ära: Brickerl (†) erhält Staatsbegräbnis dietagespresse.com/ende-einer-a...

Does ChatGPT help with students' learning performance, learning perception, and higher-order thinking? We re-analyzed a recently published meta-analysis and found that the original conclusion is almost entirely driven by publication bias.

A 2021 paper in a pay-to-publish #Nature journal claimed #mindfulness tasks (notice 3 things around you or differences between 2 similar images) reduced some cognitive #biases: doi.org/10.1057/s415... The mindful #debiasing was undetected in a re-analysis and 2 replications: doi.org/10.1007/s126...

Pleased to announce that @sdpbht.bsky.social, @lukaszwalasek.bsky.social, Feiyi Wang and I published this work in @pnas.org last month. A particularly intricate project I'm thankful to have been part of! Going from unstructured text to an attribute repr. of decisions. www.pnas.org/doi/10.1073/...

Amazing paper!

🎉 New paper out in Mindfulness 📄 🧠 Can a 5-minute online mindfulness task help you make better decisions? That’s what a widely cited study claimed. We put it to the test. Not once, but twice! OA: link.springer.com/article/10.1...

Cool paper in AMPPS of @psychscience.bsky.social "One App to Rule Them All: A One-Stop Calculator and Guide for 95 Effect-Size Variants for Two-Group Comparisons of Central Tendency, Variability, Overlap, Dominance, and Distributional Tails” doi.org/10.1177/2515...

Happy birthday, p = 0.05! I had a short introductory lecture in statistics for biologists this morning, and then it dawned on me that p = 0.05 is celebrating its hundredth birthday this year.

Happy Large Enough N day for those who observe

🚀Very excited to finally see our paper on nonsignificance misinterpretations published! 📈 Together, @smurphee.bsky.social, Aurelio Fernández, Linda Reimann and I investigated the prevalence of "p > .05 = absence of an effect" interpretations. (1/4) doi.org/10.1098/rsos...

What a plot!

So far, the best scoping review on using #LLMs in #SystematicReviews by our German colleagues "Large Language Models for Conducting Systematic Reviews: On the Rise, But Not Yet Ready for Use - A Scoping Review" #GenerativeAI #AI #EvidenceSynthesis pubmed.ncbi.nlm.nih.gov/40021099/

This is one reason why I encourage all my trainees to do at least one meta-analysis. It changes the way you report your results because you'll never forget tearing your hair out trying to calculate effect sizes and variances from papers that don't report their results in sufficient detail

💀💀💀

🚨New Publication Fresh from the Press🚨 "Student (Mis)Use of Generative AI Tools for University-Related Tasks". Together with the great Moritz Jörling, Christoph Fuchs & @robertboehm.bsky.social, we explored how university students (mis)use generative AI tools! OA: doi.org/10.1080/1044... 1/7

Reminder because I had to deal with it today: You should expect to observe mixed results in a multi-study paper, even if the H1 is true. For example, given H1 is true, the long run probability of observing 3 out of 4 significant studies, given .8 power, is 41%

Roy Baumeister called ego depletion "one of the most replicable findings in social psychology." As someone who spent 20 years studying it—and ultimately had to admit it wasn't real—I have to respectfully disagree. Here's my perspective of what went so wrong.

In case you ever wondered about the differences between magrittr pipe and base pipe 🤔 This table is taken from a great stackoverflow answer by @GeorgKindermann stackoverflow.com/questions/67... #rstats #dataviz #phd

Reminder: It's "Hedges' g" not "Hedge's g". This effect size measure was named after Larry Hedges, who first proposed this in a 1981 paper journals.sagepub.com/doi/10.3102/...

I'm just saying this is syntatically correct #rstats code

The new JASP (@jaspstats.bsky.social) version containing the updated Meta-Analysis module and many other improvements is out now!

Here is a cool little function for R that lets you check if all of the loaded packages are actually necessary for the code that follows, letting you cut down on unneeded packages. Really helpful for grading student code too, since this is a common error! funchir::stale_package_check('mycode.R')

Since this meme is doing the rounds again, here’s the reality

Nobody is btw stopping you from choosing a different color scheme 🤓

#rstats is actually fighting about Base versus Tidyverse again on this platform. We are so back

Still new to this, here is the link to the preprint🤦https://osf.io/preprints/psyarxiv/esk7h What a nice start to my Bluesky Career 😅

🚨 Preprint Alert! 🚨 "Emphasizing herd immunity in vaccine advocacy: a systematic review and three-level meta-analysis" together with @robertboehm.bsky.social , @corneliabetsch.bsky.social & Martin Voracek. In short: Communicating herd immunity increases vaccination motivation!