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Štěpán Bahník

@bahniks.bsky.social
191 followers 146 following 46 posts

psychologist interested in judgment & decision making, methodology, programming; associate professor at the Prague University of Economics and Business

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Reposted by Štěpán Bahník
Institute for Replication @i4replication.bsky.social · 04/09/2026
🧵 New DP from I4R co-director Lester Lusher, with Sonia Ale, Md Shafiqui Islam, Huda Osman & Jacob Stenstrom (Pitt): "When Samples Shape Significance." What happens when you re-estimate published results using fresh draws of the same data? Some evidence from Google Trends!
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Data Colada @datacolada.bsky.social · 02/09/2026
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
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Data Colada @datacolada.bsky.social · 31/08/2026
An influential paper by Ariely & Wertenbroch (2002) reported two studies with tampered data. Post 1 of 2. datacolada.org/138
datacolada.org
[138] Artificial Deadlines (Part 1): Evidence of Fraud in an Influential Study About Procrastination
A new paper in Psychological Science (.htm) reports a failure to replicate Study 2 of Ariely and Wertenbroch’s influential article entitled, “Procrastination, Deadlines, and Performance: Self-Contr…
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Brian Nosek @briannosek.bsky.social · 11/08/2026
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.
cos.io
OSF Changes | Center for Open Science
We are preparing substantial changes to OSF that will reduce its functionality, focus OSF on its unique strengths, and move toward an integrated model with complementary services. As part of that shif...
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Štěpán Bahník @bahniks.bsky.social · 11/08/2026
In a new paper (led by Jan Urban), we conducted a meta-analysis looking at the causal effect of environmental identity on various outcomes. While the association between identity and outcomes was strong, the effect of identity manipulations was weak. (1/2)
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Gilad Feldman @giladfeldman.bsky.social · 05/08/2026
I keep seeing/hearing people say that there aren't any open-science and meta-research events. Collecting and curating these the past month has shown me there is a LOT going on, just maybe difficult to keep track. See screenshots, take your pick. Metaventory can help: metaventory.vercel.app/events
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Petr Houdek @petrhoudek.bsky.social · 02/06/2026
1/N Can ethical people gain power inside unethical organizations? In our new paper with @bahniks.bsky.social (and originally @mvranka.bsky.social, before he left our team), we study a difficult problem: prosocial will may not be enough when the dominant coalition benefits from harmful practices.
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Daniel Lakens @lakens.bsky.social · 25/05/2026
New blog post: Evaluating Dr. Cuddy’s Claim that the Debunking of Power Posing is a Myth. daniellakens.blogspot.com/2026/05/eval... On an AI generated description of a non-existent study, incorrectly citing findings from studies, and the importance of scientific criticism.
daniellakens.blogspot.com
Evaluating Dr. Cuddy’s Claim that the Debunking of Power Posing is a Myth
In this blog post I will analyse the arguments that Dr. Amy Cuddy provided in a blog post “The "Power Posing Was Debunked" Myth: What the Re...
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Štěpán Bahník @bahniks.bsky.social · 19/05/2026
Whatever you think about AI, taking a ~5k lines of code of a program running an experiment and having it quite thoroughly cross-checked with a pre-registration in less than 5 minutes feels like magic to me.
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Ian Hussey @ianhussey.mmmdata.io · 12/03/2026
I can't stop thinking about this. Imagine: - 2200 studies, as they say >2000 - 2 studies per article given piloting/multi-study articles - No p-hacking (lol); 1 test per study (lol), 5% False Positive Rate That's 55 significant studies that are false positives Actual publications: 64
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John Drury @profjohndrury.bsky.social · 06/05/2026
Call for Editors-in-Chief at Social Psychological Bulletin spb.psychopen.eu/index.php/sp...
spb.psychopen.eu
Call for Editors-in-Chief at Social Psychological Bulletin (2027–2030)| Social Psychological Bulletin
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Emir Efendić @emire.bsky.social · 17/04/2026
Tripping this post about a PhD position I have open. Please re share or re skeet or re sky! 🙏
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Petr Houdek @petrhoudek.bsky.social · 09/04/2026
1/ New paper out: Nicolas Say, Lucie Vrbová, and I tested whether a very simple nudge can improve the forecasting performance of business students. The prompt asked students to consider multiple future scenarios and credible evidence sources before making predictions.
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Emir Efendić @emire.bsky.social · 02/04/2026
Do you want to do a PhD in Judgment and Decision Making in two beautiful European locations on human-AI interaction? Well have I got news for you. @bahniks.bsky.social and I are recruiting a candidate to start around September 2026. See here: decisionlab.vse.cz/english/we-a...
decisionlab.vse.cz
We are hiring
PhD Position in Judgment & Decision Making At a Glance Topic: Human-AI Interaction & Cognitive Biases Locations: VŠE Prague (2 years) + Maastricht University (2 years) Funding: Fully funded (4-year pr...
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Brian Nosek @briannosek.bsky.social · 01/04/2026
SCORE, a collaboration of 865 researchers, is now released as three papers in Nature, six preprints, and a lot of data (cos.io/score/). SCORE examined repeatability of findings from the social-behavioral sciences and tested whether human and automated methods could predict replicability.
cos.io
SCORE | Center for Open Science
SCORE shows that there is no shortcut to producing credible research findings, and there is no single indicator of trustworthiness. Research progress depends on transparency, rigor, and establishing r...
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Center for Open Science @cos.io · 01/04/2026
Today, the SCORE program releases its primary results! 865 researchers examined research credibility across the social and behavioral sciences, publishing three papers in Nature + five preprints. 📑 Explore the papers: www.nature.com/colle... ℹ️ Read more about SCORE: www.cos.io/score
nature.com
Reliable research in the social and behavioural and sciences
Sweeping new investigations probe the replication, robustness and reproducibility of results across the behavioural and social sciences.
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Marek Vranka @mvranka.bsky.social · 01/04/2026
"How to React in the Case of Powerful Transgressors?" tl;dr - by doing nothing, because they are powerful and thus do not care about what you do anyway 🫠 onlinelibrary.wiley.com/doi/10.1002/...
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Petr Houdek @petrhoudek.bsky.social · 01/04/2026
1/N After 5 years in the making, this paper is finally out. “How to React in the Case of Powerful Transgressors: Kill Them With Kindness or Punishment?” We study situations in which a superior acts unethically and what actually follows from punishing, forgiving, or avoiding them.
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Simon Columbus @simoncolumbus.bsky.social · 20/03/2026
We're hiring a number of PhD students in psychology and neuroscience at St Andrews. Positions are for four years. UK applicants only, unfortunately. Deadline April 13. I'm eligible as a supervisor -- do reach out if you'd like to work with me. www.findaphd.com/phds/program...
findaphd.com
FindAPhD : 4-year PhD / Associate Lecturer positions in the School of Psychology & Neuroscience at University of St Andrews
Apply for a PhD: 4-year PhD / Associate Lecturer positions in the School of Psychology & Neuroscience at University of St Andrews
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Annika Külpmann @anniria.bsky.social · 25/01/2026
This figure shows the distribution of correlations between different IGT scoring strategies: a) correlations among all scoring strategies, and b) correlations between the modal scoring strategy—the most commonly used score [(C+D)−(A+B)] across all trials—and all other strategies
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Andrew Gelman et al. @statmodeling.bsky.social · 22/01/2026
This paper in Management Science has been cited more than 6,000 times. Wall Street execs, top govt officials, and even a former U.S. Vice President have all referenced it. It’s fatally flawed, and the scholarly community refuses to do anything about it. statmodeling.stat.columbia.edu/2026/01/22/a...
statmodeling.stat.columbia.edu
This paper in Management Science has been cited more than 6,000 times. Wall Street executives, top government officials, and even a former U.S. Vice President have all referenced it. It’s fatally fl...
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Štěpán Bahník @bahniks.bsky.social · 19/01/2026
OSF preprints disappeared, PsyArXiv moderators think that I am not doing psychology; what are the alternatives for posting preprints? SSRN owned by Elsevier? Are there some better options?
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Štěpán Bahník @bahniks.bsky.social · 09/01/2026
"The Bots Ruining Social Science Are Not Bots at All" ... the name of the platform should have given us a hint.
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Štěpán Bahník @bahniks.bsky.social · 07/01/2026
Given that this paper (purported to show confirmation bias in data analysis) seemed to have gathered some interest, it is also noteworthy that the results are often significant only at the alpha = .10 level, and immigration sentiment explains just a small part of variability in dependent variables.
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Barnabas Szaszi @szaszibarnabas.bsky.social · 05/01/2026
Do you want to work with me?:) Please spread the word! We are looking for talented Post-doc candidates for a 10-month Junior Fellowship at the Behavioral Science Center, hosted by the Corvinus Institute for Advanced Studies (CIAS). 1/6 www.the-bs-lab.com
the-bs-lab.com
Behavioral Science
What do we do? We conduct large-scale behavioral science studies to improve the daily decisions, behavior, and experience of vulnerable individuals (e.g., the well-being of citizens and families / ed...
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Petr Houdek @petrhoudek.bsky.social · 02/01/2026
Are teachers objective and impartial when grading (business school) students? Our new (with @bahniks.bsky.social and Simon Senčar) mixed-methods paper examines “grade enhancement”: the practice of raising grades without corresponding improvements in performance. authors.elsevier.com/a/1mNHq38nsw...
authors.elsevier.com
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Michel Nivard @michelnivard.bsky.social · 20/12/2025
This smells distinctly like collider bias and/or selection bias and/or regression to the mean... You simply can't select teen prodigies, and world class athletes rom databases, and go run regressions without serious consideration of the selection process!
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Štěpán Bahník @bahniks.bsky.social · 19/12/2025
In how many ways is this a poor item for a numeracy scale? a) 0 b) 1 c) 2 d) 3 or more
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Karolina Ścigała @kascigala.bsky.social · 05/12/2025
Does “feeling right”—that is, experiencing regulatory fit—lead us to act more in line with our moral preferences? With @schildchristoph.bsky.social and @stepf.bsky.social, we conducted a series of the first large-scale, independent close replications in the field of regulatory fit.
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Štěpán Bahník @bahniks.bsky.social · 22/11/2025
It's great that it will be possible to drive the kids with measles to a hospital in a self-driving ambulance.
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Štěpán Bahník @bahniks.bsky.social · 23/10/2025
In a new paper with Michael Arntz, we show that larger gifts, monetary gifts, and gifts given in a purely professional relationship are more likely to be perceived as bribes: www.tandfonline.com/doi/full/10....
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Štěpán Bahník @bahniks.bsky.social · 15/10/2025
In a new short conceptual/review paper with @petrhoudek.bsky.social, we describe how groups or organizations can become corrupt due to selection and sorting effects, socialisation, institutional capture, and norm entrenchment: authors.elsevier.com/c/1ltb3,rU~O...
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Štěpán Bahník @bahniks.bsky.social · 15/10/2025
In a new short conceptual/review paper with @petrhoudek.bsky.social, we describe how groups or organizations can become corrupt due to selection and sorting effects, socialisation, institutional capture, and norm entrenchment: authors.elsevier.com/c/1ltb3,rU~O...
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Matti Vuorre @matti.vuorre.com · 14/10/2025
I argue that the time is right for widespread adoption of open review platforms like PREreview (prereview.org) and Review Commons (www.reviewcommons.org) and reject the arbitrary administrative overhead imposed on us by the publication industry.
Never mind that my colleagues are reading and citing the document on PsyArXiv. For this manuscript to count as a legitimate scientific product I must first endure inexplicable delays; arbitrary formatting requirements (the formatting manual costs $47.99); conflicts between my scholarly values and the astronomical profits that private publishing companies make from our taxpayer funded work; introduction of errors into my manuscript by the journal’s proofreaders; websites from hell; and of course peer review. Without that process of publication, my work will remain a ‘preprint’—an incomplete and unreliable artifact unworthy of a place in the scientific literature.

Could things be better? I surmise that, like fish unaware of their wet surrounds, academics don’t feel the pain because it’s all they’ve ever known.

For one, peer review has nothing to do with commercial journals or publishers—it’s the voluntary labor of our colleagues in service of scientific progress. We could, right now, be reviewing each others work on PREreview or Review Commons. Alas, instead of these scholarly debates we are complacent with pretending that a 40% profit margin industry is somehow facilitating the peer-review process better than the transparent platforms already available to us, for free.
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moin syed @syeducation.bsky.social · 14/10/2025
Nice post from Matti on preprints and the nonsense of journals. This paragraph is outstanding.
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Brian Nosek @briannosek.bsky.social · 27/08/2025
10 years ago?! Holy smokes.
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Kyle Fiore Law, PhD @kyleflaw.com · 27/08/2025
🪦 New in @pnas.org: we analyzed 38 million U.S. obituaries to ask what signals a life well lived: What values are people most remembered for? How do legacies shift with cultural events? How do age and gender shape what it means to have lived well? www.pnas.org/doi/10.1073/...
pnas.org
An exploration of basic human values in 38 million obituaries over 30 years | PNAS
How societies remember the dead can reveal what people value in life. We analyzed 38 million obituaries from the United States to examine how perso...
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Tamás Nagy @nagyt.bsky.social · 11/07/2025
🧌This "bestiary" can be a vital resource for researchers, educators, and reviewers to recognize, understand, and mitigate QRPs, ultimately raising the standard of psychological research. Read the full article here: journals.sagepub.com/doi/10.1177/...
journals.sagepub.com
Bestiary of Questionable Research Practices in Psychology - Tamás Nagy, Jane Hergert, Mahmoud M. Elsherif, Lukas Wallrich, Kathleen Schmidt, Tal Waltzer, Jason W. Payne, Biljana Gjoneska, Yashvin Seet...
Questionable research practices (QRPs) pose a significant threat to the quality of scientific research. However, historically, they remain ill-defined, and a co...
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Štěpán Bahník @bahniks.bsky.social · 01/07/2025
Our new paper on self-selection effects in dishonesty with @petrhoudek.bsky.social, @marekhudik.bsky.social, and Nicolas Say is out now: authors.elsevier.com/a/1lMN67tbfH...
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Štěpán Bahník @bahniks.bsky.social · 13/06/2025
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... >
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František Bartoš @fbartos.bsky.social · 12/05/2025
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.
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Miloš Fišar @milosfisar.bsky.social · 19/03/2025
Submissions for our 2025 ESA European Meeting are now open! Send your abstract by May 5 and join us in September in Brno @econmuni.bsky.social More info:👇 esa2025.econ.muni.cz #econtwitter #econsky
esa2025.econ.muni.cz
2025 European Meeting of the Economic Science Association in Brno, Czech Republic | 2025 ESA European Meeting
Join the European Meeting of the Economic Science Association 2025 at Masaryk University.
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Ed Conway @edconway.bsky.social · 24/02/2025
🧵Three years ago, when Russia invaded Ukraine, EU, UK and other nations vowed to wage economic war, via the toughest sanctions in history. So... how's that going? We've spent months documenting what ACTUALLY happened. Here's a thread of our investigations on the REAL story on sanctions... 👇
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Daniel Lakens @lakens.bsky.social · 31/01/2025
Which findings should we replicate? Isager et al propose a 'replication value', defined as the maximum expected utility gain when conducting a replication. It is a function of (1) the value of being certain about the claim, and (2) uncertainty about the claim. osf.io/preprints/me...
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Štěpán Bahník @bahniks.bsky.social · 27/01/2025
Last week to apply for a postdoctoral position to work with me, @lubomircingl.bsky.social, and @petrhoudek.bsky.social: bsky.app/profile/bahn... Salary is competitive, position potentially for up to 3 years, projects are interesting, Prague is great to live in, and application process is easy.
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Štěpán Bahník @bahniks.bsky.social · 13/01/2025
We are hiring up to 3 postdoctoral researchers in economics, psychology, or organizational studies to join our interdisciplinary group at the Prague University of Economics and Business: im.vse.cz/cevyz/englis...
im.vse.cz
We are hiring!
The Faculty of Business Administration, Prague University of Economics and Business is inviting applications for the following positions: Up to 3 positions of Postdoctoral Researchers in the fields of...
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Emir Efendić @emire.bsky.social · 13/01/2025
Our department at @umsbe.bsky.social has an opening for a PhD position. The focus is on Marketing but defined broadly. Please spread the word! www.academictransfer.com/nl/348321/ph...
academictransfer.com
PhD Position at the Department of Marketing and Supply Chain Management
Are you passionate about advancing marketing research and eager to pursue a PhD in a dynamic, internationally oriented academic environment? Join us at Maastricht University! Job Description The Depar...
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Štěpán Bahník @bahniks.bsky.social · 13/01/2025
We are hiring up to 3 postdoctoral researchers in economics, psychology, or organizational studies to join our interdisciplinary group at the Prague University of Economics and Business: im.vse.cz/cevyz/englis...
im.vse.cz
We are hiring!
The Faculty of Business Administration, Prague University of Economics and Business is inviting applications for the following positions: Up to 3 positions of Postdoctoral Researchers in the fields of...
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Marek Hudik @marekhudik.bsky.social · 10/01/2025
Check out our latest working paper, "Understanding Appointment Decisions: Do Material Interests Trump the Ethical Imperatives?" with @bahniks.bsky.social @petrhoudek.bsky.social and Nicolas Say. 1/5
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