We released two preprints describing the JASP Meta-Analytic functionality in detail. Meta-Analysis with JASP, Part I: Classical Approaches (arxiv.org/abs/2509.09845) Meta-Analysis with JASP, Part II: Bayesian Approaches (arxiv.org/abs/2509.09850)

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

New paper for anyone working with data: Better data viz - for free, in few clicks. Below, all N = 111, M = 0.04, SD = 0.27. One-sided t-tests vs. 0 yield: t(110) = 1.67, p = .049. Use raincloud plots. Or risk wrong conclusions! Plot w/ @jaspstats.bsky.social today! 🧪 📊 #PsychSciSky #StatsSky 🧵👇

Fair coins tend to land on the same side they started: evidence from 350,757 flips. That's the title of our paper summarizing ~650 hours of coin-tossing experimentation just published in the Journal of the American Statistical Association. doi.org/10.1080/0162...

It is a bit funny seing many people outraged about p-curve, after the well deserved critique by Moorey, but completely unfazed about the still dominant practice of using funnel plots and fail-safe n to claim absence of publication bias. With common defense "that’s how other studies did it before"...

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/?

I'm excited that our preregistration template for simulation studies is now available on OSF! See below for a brief interview with the Center for Open Science about the template and why we created it..

@fbartos.bsky.social @maxmaier.bsky.social‬ & EJ Wagenmakers have extended RoBMA with 3-level publication bias-adjusted model-averaged meta-regression models in R along with the usual code-free and intuitive @jaspstats.bsky.social implementation. Nerdy details are osf.io/preprints/ps...

The new version of JASP (0.95) containing another significant update to the Meta-Analysis module is out. You can perform state-of-the-art Bayesian publication bias-adjusted meta-regression in only a few clicks. A couple of additional clicks get you publication-ready figures!

We finally extended robust Bayesian meta-analysis to multilevel settings. Now, you can fit 3-level publication bias-adjusted model-averaged meta-regression models in R (and in about a week in @jaspstats.bsky.social too!)

Martin Hayden from LearnSixSigma.co.uk shares his experience of using JASP for quality control -- a free and open-source statistical software for which we offer enterprise-level services. Check it out, maybe you will switch to using @jaspstats.bsky.social too!

Big team effort & thx collaborators Led by @adamfinnemann.bsky.social w/@noraskjerdingstad.bsky.social, L. Speyer, @orestiszavlis.bsky.social, @fbartos.bsky.social, R. Wiers, Han van der Maas, Chris Sibley, Sverre Johnson, @mahelmich.bsky.social & A. Hoffart authors.elsevier.com/c/1lF9zbXYiy...

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/

I will teach my advanced #MetaAnalysis course this year (September 24-26, 2025): www.wvbauer.com/doku.php/cou... Since my regular meta-analysis course is also overdue, I decided to extend the advanced course by an extra day to cover the standard methods more thoroughly.

A recently published meta-analysis in Nature Human Behaviour "found evidence supporting the efficacy of social comparison as a behaviour change technique in shaping behaviour in the desired direction". I was curious, so I re-analyzed the manuscript, but the funnel plots below say it all.

We started a company to provide enterprise-level support for open-source statistical software @jaspstats.bsky.social . Our website with the mission and offers just went online! Is your business paying large licensing fees for statistical software? Are you looking for a change? Check it out!

🚀 PhD Position in Psychological Methods at @unimarburg.bsky.social 📅 Start: 01.10.2025 | 💼 50% TV-H E13 | ⏳ 3 years Focus on statistical modeling—Bayesian statistics, cognitive modeling, psychometrics. 🔗 Apply now: uni-marburg.de/r5dKTr 🔄 Thanks for sharing!

We are running the summer JASP workshops again this year. We offer both on-site/online participation, see more details at: jasp-stats.org/workshops/

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.

Looking for recommendations to finish my #statistics #mugs collection!

The Journal of Robustness Reports is here. Diamond open access. A model for #openscience and #metascience. @balazsaczel.bsky.social scipost.org/JRobustRep.0... 🧪

We are live! Introducing the "Journal of Robustness Reports" – a Diamond Open-Access journal dedicated to publishing short reanalyses of empirical findings. Check out our website and blog post about the journal: 🌐 scipost.org/JRobustRep 📄 www.bayesianspectacles.org/introducing-...

Love the idea scipost.org/JRobustRep "We hope that the Journal of Robustness Reports will help make reanalyses of published findings the norm across the empirical sciences." #diamondOA scipost.org/JRobustRep/a... @fbartos.bsky.social @balazsaczel.bsky.social @ejwagenmakers.bsky.social

The upcoming version of @jaspstats.bsky.social is gonna feature an even better version of the meta-analysis module. For example, the forest plot will allow aggregating effect size estimate information with just a couple click!

Our meta-analysis on changes in oral contraceptive use and partnered women's sexual satisfaction is now published in Hormones and Behavior. w/ @juliastern.bsky.social, @fbartos.bsky.social, Yasaman Rafiee, @tvpollet.bsky.social, and Ben Jones. www.sciencedirect.com/science/arti...

🛠️☀️ 3 of 4 Hybrid Summer Workshops: Get familiar and confident with key concepts in machine learning. Accessible intro, no background in statistics or coding needed, intuitive graphical user interface. ECs for students available. jasp-stats.org/2025/03/05/h...

🛠️☀️ 4 of 4 Hybrid Summer Workshops: Ever wanted to learn Bayesian statistics? Here´s your gentle introduction! Intuitive graphical user interface without coding. Taught by experts @richarddmorey.bsky.social & @ejwagenmakers.bsky.social ECs for students available. jasp-stats.org/2025/03/06/h...

This summer: A week of hybrid workshops. 🛠️☀️ jasp-stats.org/workshops/ Discovering Statistics using JASP Bayesian Hypothesis Testing with JASP Machine Learning with JASP State-of-the-Art Meta-Analysis with JASP ECs for students available.

🛠️☀️ 2 of 4 Hybrid Summer Workshops: Escalate your meta-analytical skills: meta-regression, multivariate/multilevel, & Bayesian publication bias-adjusted meta-analyses. Intuitive graphical user interface - no coding. Taught by @fbartos.bsky.social w/ real-world data. see jasp-stats.org/workshopmeta/

Another improvement to the RoBMA package on it's way to CRAN: Bayesian model-averaged binomial-normal meta-regression models. The next update will bring various random effects and multilevel hierarchical models to adjust for various dependencies between studies.

There is a major improvement to the RoBMA package. Model structure and parameters can be estimated within a single MCMC yielding a tremendous speedup! A Bayesian publication bias model-averaged meta-regression can be estimated in less than a minute now! (down from 30min)

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

Video of the Ig Nobel Face-to-Face meeting, which allowed time for discussion. I'm talking about our 350,757 coin flips. Also features the UvA work on drunken worms. improbable.com/2024/12/03/i...

The Raincloud Quartet (new pre-print) All N = 111, M = 0.04, SD = 0.27. One-sided t-tests vs. 0 yield: t(110) = 1.67, p = .049. Only raincloud plots reveal the qualitative differences, preventing the drawing of inappropriate conclusions. How did we create the quartet? Where are data & code? 🧵👇

Our new book (in press) comes at a 30% discount to JASP Community Members. Read the blog post here: jasp-stats.org/2024/11/21/d... More info on the JASP Community below 👇

Here is a starter pack for Forensic Meta-science, data sleuthing, and scientific error detection. This might already exist, but I couldn’t find a starter pack anywhere else. Let me know who else I should add that are on bluesky. go.bsky.app/JJqx4fv

IN PRESS: Discovering Statistics Using JASP

If you only plot means & confidence intervals, you miss out. That´s why @jaspstats.bsky.social lets you create raincloud plots in mere clicks - no programming whatsoever. Tell your students. YouTube tutorial: www.youtube.com/watch?v=AAdX... 🧪 #PsySciSky 📊

Simulation studies are essential for methods research. How well are they conducted & reported? How can we improve their quality? Out now in Psychological Methods, see 🧵 below. With @fbartos.bsky.social, @timpmorris.bsky.social, @boulesteixlaure.bsky.social, @danielheck.bsky.social & Samuel Pawel

We are in the final phases of preparing a new update of JASP (@jaspstats.bsky.social). I'm creating examples for the completely revamped Meta-Analysis module - check out how stunning forest and funnel plots can be created with only a couple of mouse clicks! #meta-analysis

Be in community with other doctoral students journeying through academia. Please reply to this post if you want to be added!! #DocStudents go.bsky.app/QTfevfQ

Next-Gen t-Tests? Check out this new paper led by @maxmaier.bsky.social and František Bartoš. We even have a video about it on our youtube channel.

Have you run #simulation studies and encountered issues with missing results, failure, or non-convergence? In a new preprint by S. Pawel, F. Bartoš, me & A. Lohmann, we overview different approaches to address these issues and review current practices. arxiv.org/abs/2409.18527 #stats

Hi all, I am a Psych. Methods PhD at the UvA (Amsterdam). My goal is to improve statistical procedures and enable researchers to draw better inferences from data. I am interested in Bayesian statistics, meta-analyses, publication bias, and replicability. I also flipped some coins a couple of times.

We reviewed 100 psych. simulation studies & find room for improvement in planning/reporting. As a remedy, we (František Bartoš, @timpmorris.bsky.social Anne-Laure Boulesteix, @danielheck.bsky.social & Samuel Pawel) present ADEMP-PreReg, a simulation study preregistration & reporting template 🧵/1