For all who use Bayesian hierarchical models, have a look at our new preprint, out now together with @linushof.bsky.social @nunobusch.bsky.social and @thorstenpachur.bsky.social osf.io/preprints/ps...

New paper showing that both the test–retest stability and the split-half reliability of the repetition-based truth effect is close to zero: www.sciencedirect.com/science/arti...

At the FORRT Replication Hub, our mission is to support researchers who want to replicate previous findings. We have now published a big new component with which we want to fulfill this mission: An open access handbook for reproduction and replication studies: forrt.org/replication_...

Help us show there is support for offering registered reports at one of Psychology's leading method's journal! chng.it/TwwnVBScVb

Reading this and trying to take in the full enormity of what is happening. The scale of it. open.substack.com/pub/christin...

1/3 I think the premise is worth some attention: why is there a (frequently wrong) expectation that science is precise? I am often confused even by textbooks for university student audiences. Confused about how frequently findings and expert judgements are portrayed as certain and final.

"Science is expected to be precise, and admissions of uncertainty (especially large levels) can be perceived as scientific failures, rather than natural limitations of knowledge of a topic." 😕 Broomell et al. (2025). Expert judgment and communication of uncertainty. doi.org/10.1007/978-...

Just submitted a minor bugfix of RRreg to CRAN: github.com/danheck/RRre... The R package focuses on analyzing univariate & multivariate data collected with the Randomized Response Technique (RRT), which protects anonymity in surveys by randomly scrambling responses. I also added a new logo 🚀

What an incredible resource from the indefatigable @chrischirp.bsky.social . No one can say we didn't know -- it's all happening in broad daylight.

Ein ganz ganz wichtiger Text in diesen Zeiten. "Die vorliegende Kampagne gegen eine deutsche Top-Juristin ist nichts anderes als ein weiterer Versuch der Trumpisierung deutscher Politik. [...] es liegt kurzum an wirklich allen Demokraten, dies nicht zuzulassen." 👊

Yet another checklist for science 🚀 ✅A checklist... ✅for incentivizing... ✅and facilitating... ✅good theory building ✅https://osf.io/preprints/osf/7qvfz_v2 Luckily enough, we can nowadays use AI to fill out all the checklists during the research process 😅

Here's a paper with a skeleton of the idea, but there is really lots of research to do on the structure of workflow networks, now to make them robust, how to development diagnostics and calculi for steps within them. doi.org/10.1073/pnas...

Experimentology is out today!!! A group of us wrote a free online textbook for experimental methods, available at experimentology.io - the idea was to integrate open science into all aspects of the experimental workflow from planning to design, analysis, and writing.

Simplifying ethics applications and their evaluation 👍 Leibniz Institute for Psychology (ZPID) provides a free webtool for ethics proposals in collaboration with #Chemnitz #University of #Technology 👉 ethiktool.org/en Thank you @volkswagenstiftung.de #ethic #psychology #humanities

Please read this article. Once you see it, you can't not see it. And it will make you a better consumer of the news and therefore a better and more informed citizen. 👇👇👇👇👇👇👇👇👇👇👇

#WissenschaftlicheIntegrität: Die Leitung einer wissenschaftlichen Arbeitseinheit trägt die #Verantwortung für die gesamte Einheit. Leitlinie 4 des #GWP Kodex beschäftigt sich mit Aufgaben, Rollen & Pflichten - auch in Bezug auf Karriereförderung oder Machtmissbrauch: fcld.ly/rcy0aos

A few months ago, Nature published how-to guide for using ChatGPT to write your peer reviews in 30 minutes. This is, of course, a horrible idea. Here’s my response with @jbakcoleman.bsky.social .

Paper by @lknochelmann.bsky.social now published in the European Journal of Social Psychology 🥳 In an intervention tournament, we investigated how to best enhance a person’s intellectual humility. --> doi.org/10.1002/ejsp...

Research on processing fluency used to be very popular with publications in Psychological Science, PNAS, etc. Now there are several prominent failed replications of fluency effects. A newest one: bsky.app/profile/dani... >

New paper by my PhD student @semihaktepe.bsky.social now published 🚀 "Revisiting the effect of discrepant perceptual fluency on truth judgments" tinyurl.com/2eepue5y --> Two experiments & a meta-analysis indicate that high visual contrast does not lead to higher truth judgments.

I cannot fathom why these monstrosities are allowed on our roads. Regulations relating to both frontal visibility (some SUVs literally have worse FV than a tank, increasing the likelihood of hitting someone) and bonnet height (increases the severity when someone is hit) seem a no-brainer to me.

🚀Postdoc position @unimarburg.bsky.social in the project: "Bridging the Gap Between Verbal Psychological Theories & Formal Statistical Modeling with Large Language Models" (funded by @volkswagenstiftung.de) 📅Start: 01.10.2025 | ⏳4 years 🔗 Apply now: uni-marburg.de/jhbCen 🔄 Thanks for sharing!

I'm still amazed how much of road danger is entirely explained by car speed

Great overview of benefits/drawbacks of LLMs for writing & coding👏 "Writing is hard because the process of getting something onto the page helps us figure out what we think—about a topic, a problem or an idea. If we turn to AI to do the writing, we’re not going to be doing the thinking either."

Psychological inoculation is a very popular intervention against online misinfo, but it hasn't been tested using real-world outcomes in realistic scenarios. In a new paper just published in PNAS Nexus, this is what we did: academic.oup.com/pnasnexus/ar... Short version: It didn't really work.

🚀 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!

🚀Postdoc position @unimarburg.bsky.social in the project: "Bridging the Gap Between Verbal Psychological Theories & Formal Statistical Modeling with Large Language Models" (funded by @volkswagenstiftung.de) 📅Start: 01.10.2025 | ⏳4 years 🔗 Apply now: uni-marburg.de/jhbCen 🔄 Thanks for sharing!

Congratulations to the four poster award winners 👏👏👏 Kayla Carter, Leona Hammelrath, Anna Jori Lücke, and @bsiepe.bsky.social 💐

Great paper. I especially liked this quote: "All we can do is postulate (often blatantly wrong) theories and rigorously analyze their explanatory scope and limits."

This is a must-read. Csaba Szabó, the author of Unreliable, was approached by a paper mill, and he decided to conduct a sting operation. He documented how paper mills operate. forbetterscience.com/2025/05/19/a...

🚀 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!

🚨 REPLICATION REPORT UPDATE: One year ago, a tweet by John Holbein alerted me, @ollefolke.bsky.social, and @jopieboy.bsky.social to a paper with a shocking result about Sweden’s law criminalizing the purchase of sex.🧵

Great new preprint about the difficulties of estimating the centrality of individualized dynamic networks led by my PhD student @bsiepe.bsky.social 🥳

Honey, we fixed Signal Detection Theory (SDT)! In this preprint, Constantin Meyer-Grant, David Kellen, Sam Harding, and I critically evaluate the (unequal-variance) Gaussian SDT model in recognition memory and pursue the Gumbel-min model as a principled alternative: doi.org/10.31234/osf... 🧵

I am looking forward to expanding the scope of my professorship by combining cognitive and statistical modeling with LLMs😊 There will be two job openings for postdoc positions soon - one starting in September 2025 and another one a year later.

Powerful message from #teap2025 key organizer @melissavo.bsky.social solidarity for science!

How does plausibility shape the truth effect? In our new paper with @danielheck.bsky.social, we propose a Bayesian model specifying how repetition and plausibility jointly influence binary truth judgments in light of nonlinear transformations. 🔓 Read it for free: rdcu.be/eccDv

📢 Now out at Computers in Human Behavior: doi.org/10.1016/j.ch... In two studies, @danielheck.bsky.social, Joachim Kimmerle and I show that a sequential judgment process is more successful in judgment aggregation than wisdom of crowds. Opting out even increases this advantage.

New preprint by my PhD student @semihaktepe.bsky.social: Revisiting the Effect of Discrepant Perceptual Fluency on Truth Judgments osf.io/preprints/ps... We could not replicate the effect that higher color contrast results in higher truth judgments in two online experiments (N=98 and N=294).

We have a new reproduction. Siepe et al. reproduce: "A systematic review and Bayesian meta-analysis of the acoustic features of infant-directed speech" by Cox et al. @naturehumbehav.bsky.social. Full report below.

🏰 PhD position on computational modelling | collective dynamics | cultural evolution 🏰 Get in touch with any questions you might have and join me in beautiful Marburg! stellenangebote.uni-marburg.de/jobposting/c... (Deutsch) stellenangebote.uni-marburg.de/jobposting/3... (English)

Finally published online at the Journal of Personality and Social Psychology 🥳 "Cheat, cheat, repeat: On the consistency of dishonest behavior in structurally comparable situations" Journal: doi.org/10.1037/pspp... Preprint: osf.io/preprints/ps...

New paper published in Psychonomic Bulletin & Review 🥳 doi.org/10.3758/s134...

We (matzekloft.bsky.social, Semih Aktepe, @danielheck.bsky.social) recently participated in a robustness reproduction of articles in Nature Human Behaviour. It was a nice learning experience to check the reproducibility of others' code and to think about useful additional robustness analyses

Now published in Educational and Psychological Measurement: journals.sagepub.com/doi/10.1177/...

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

Although misinformation clearly played a role in the election, I'll add that misinformation alone cannot account for this result. Millions of Americans knowingly voted for this man yet again (misinformed or not). That is on America. Unfortunately, the era of falsehood has only just begun.

New pulication in JPSP with Isabel Thielmann, Benjamin Hilbig & @schildchristoph.bsky.social Cheat, cheat, repeat: On the consistency of dishonest behavior in structurally comparable situations doi.org/10.31234/osf... --> incentivized dishonest behavior is consistent across 5 weeks & 3 years

With all the new people on here (hi!), a delayed summary of our paper on Bayesian estimation and comparison of n=1 gVAR/network models, recently published in PsychMethods: How can we understand whether differences in these popular, but highly parameterized models reflect more than just noise? 🧵