Bastian Jaeger

New preprint! 🎉 I analysed 1660 papers from 4 psychology journals and found materials sharing went from 9% of papers in 2015 to 82% in 2025, and these materials *do* get downloaded — a median of 135 times each. BUT shared code is often hard to run. doi.org/10.31234/osf... Let's walk through it 🧵

🚨 It's published! 🚨 This is the big one. 100 cultures, 12,000 people, 108 researchers. Why people (and our most-used surveys) get collectivism wrong and how to fix it. www.nature.com/articles/s41... @natureportfolio.nature.com

Congratulations to Elsevier on this insanity my colleague found. Is anything in this clinical trial from Spain and UK real? www.cell.com/the-innovati...

Excited to share this new preprint from @lindseytepfer.bsky.social, @chujunlin.bsky.social, and me, in which we investigate the different ways our brains allow us to change our minds about people! "The neurocomputational mechanisms of naturalistic trait impression updating" osf.io/preprints/ps...

Research by @bxjaeger.bsky.social et al suggests that, compared to scientific experts, laypeople are 8pp less likely to attribute consciousness and 21 pp less likely to attribute emotions to non-human animals, and on average also more confident in their beliefs: buff.ly/5RapCMB

For the Replicability Project: Health Behavior we need some editors and reviewers of analysis plans for secondary data replications, especially for complex designs including multilevel, weighting, clustering, missing data. Earns coauthorship on the summary paper. Interested? replications@cos.io

Psych Science has retracted Ariely & Wertenbroch (2002). The second author requested the retraction. Both authors agreed to it. journals.sagepub.com/doi/full/10.... So grateful to @datacolada.bsky.social for these blog posts and the work behind them: datacolada.org/138 and datacolada.org/139 1/2

Colada[139] Artificial Deadlines Part 2 Evidence of fraud in the 25 year old gradesheet behind the key finding in an influential paper on deadlines and procrastination. datacolada.org/139

An influential paper by Ariely & Wertenbroch (2002) reported two studies with tampered data. Post 1 of 2. datacolada.org/138

Sensing your body (‘Interoception’) is everywhere in theories of mental health. But when we tested how well hundreds of people sensed their heart and lungs, the link to symptoms was almost nowhere to be found. 💣 🚨New @natmentalhealth.nature.com paper 🚨🎉 asks why 🧵 www.nature.com/articles/s44...

Psychological Science special issue call 📣 Ever had your research denigrated bc it's "only descriptive", "what's the mechanism though?" and "but what are the theoretical implications?" Now has come your time to shine. Send your best descriptive work! www.psychologicalscience.org/publications...

Over the next several months, we will phase out some popular OSF features. These changes do not affect current public content, which remains safe and accessible. We have prepared support material to help users adapt. I am very sorry for the disruption to your work. Please read this post for details.

Item Selection as the Cause and Solution to Validity Problems in Psychology journals.sagepub.com/doi/10.1177/...

📢 ***Call for papers at Psychological Science (APS)*** Dr Roni Porat and I are editing a special issue, "From Lab to Life: Psychological Science in the Real World.” Please see the detailed call here (www.psychologicalscience.org/publications...) and send us your best work!

New Jingle assessment: we show that the "Perspective Taking Protocol" has very poor reliability and near-zero convergent validity with other nominal measures of emotional and spatial perspective taking, empathy, and theory of mind. w/ @malte.the100.ci

New blog post! Odds ratios are...a bit weird. Here I explain two problems (interpretation, non-collapsibility) and provide some simple recommendations for improved reporting. www.the100.ci/2026/07/30/r...

New preprint w/ Leo Tiokhin & @lakens.bsky.social! Registered Reports (RRs) are great for science b/c publication is guaranteed before results are known, reducing publication bias & QRPs. This feature supposedly also makes them great for *scientists*. But is that really true? 1/ tinyurl.com/4sy993rr

New paper out now 🥳 When psychologists discuss generalisability, they often refer to vague notions of representativeness. We provide an accessible intro to the total survey error framework as a tool to reason about this more rigorously. w @taymalsalti.bsky.social @ruben.the100.ci >

New meta by @peterhaehner.bsky.social et al (I'm a little middle author) on individual differences in personality change across the lifespan (229 studies, N = 230k) 10.1037/bul0000525 Cool finding (imo): For all Big Five, variance in change is greatest in youth, declining through young adulthood!

I'm hiring! I am currently establishing my new Research Group for Personality Psychology at Ulm University and am looking for a motivated researcher to join the team starting October 1, 2026 (or by arrangement). 🧵👇 (1/4) 🔗 Full description and details: stellenangebote.uni-ulm.de/jobposting/a...

One takeaway from our ongoing meta-analysis of meat reduction interventions: We need higher-quality evidence. We've included 451 effect sizes from 162 studies so far. Only one effect size came from a study with all 5 quality markers shown below. #EASP2026

HBS' latest filing in the Gino lawsuit contains a few new details: 1. A committee of 26 professors, admins, and fellows reviewed the allegations, and *unanimously concluded* that there was *clear and convincing evidence* of research misconduct.

@keithpayne.bsky.social, @jimmycalanchini.bsky.social, Heidi Vuletich and I are co-editing a new Social Cognition special issue titled "10 Years of Bias of Crowds – Reflections and Future Directions". Deadline for letters of intent is July 15th. bit.ly/3R9e8KB

1/ Can AI help researchers check whether published social science results actually reproduce? In our new PNAS paper, we tested this directly in the AI Replication Games: 288 researchers, 103 teams, and real replication packages from quantitative social science.

Why do humans punish? Our new paper, with @manvir.bsky.social, is out in Psychological Science! With experiments in a small-scale society (Mentawai) & the US, we test whether punitive cognition evolved to deter wrongdoing or restore fairness. link: tinyurl.com/msrmu7cc pdf: tinyurl.com/mvprz8fb

Excellent news! Nature is expanding Registered Reports to all the fields in which they publish! A great result by all those proposing this strong solution to publication bias and selective reporting (and getting expert feedback before data collection)! www.nature.com/articles/d41...

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If you compare people's life satisfaction to their retrospective judgments, it suggests that happiness is not declining. Instead, our expectations are changing with aggregate improvements so our relative satisfaction is rescaled for current circumstances www.sciencedirect.com/science/arti...

Collabra: Psychology, the official journal of the Society for the Improvement of Psychological Science, seeks applications for Editor-in-Chief! The SIPS Publications Committee encourages editors with innovative ideas about how Collabra: Psychology can best accomplish its mission to apply.

Two new facts stand out: 1. 85% of hallucinated citations in preprints are also in the subsequent journal version (thanks, peer review!) 2. Fake cites more likely to use the names of (male) scholars who are already highly cited, creating a fake-citation Matthew effect. arxiv.org/abs/2605.07723