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Are supplementary materials the new file drawer?

In short, placing information in supplementary materials should be justified, organised within and between files, and controlled by peers. The article is behind a paywall due to Springer Nature’s outrageous publication fees, but it can be accessed a few times through this link: rdcu.be/e6q9f

rdcu.be

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In the article, I discuss the influence of external constraints, such as word limits, in shaping the use of supplementary materials. I also review possible solutions to better organise information between the main document and the supplements.

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While the file drawer problem is about selectively *reporting* findings, misusing supplementary materials is about selectively *presenting* information. Everything is technically there and available, but not all elements are made equally visible to readers.

In this short commentary, I argue that supplementary materials may provide the perfect opportunity to spin findings and make manuscripts look more consistent, a kind of file drawer 2.0.

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Kenzo Nera @kenzonera.bsky.social · 17/12/2025

Who cares about supplementary materials? Is there any research activity less stimulating than checking these endless, messy files? Unfortunately, blind spots rarely bode well for science.

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This was not an easy one to write, but here it is! 🎈🤡 Freshly published in Collabra: Psychology: the life and death of one of the coolest findings in my PhD dissertation. 🎈🤡 With the usual – and wonderful – Karen M. Douglas, @paulbertin.bsky.social, and @olivierklein.bsky.social. 1/11

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Olivier Klein @olivierklein.bsky.social · 15/11/2025

New publication. Congrats to the whole team, and especially @paulbertin.bsky.social who led this effort. Thanks also to the editor (Nicolas Sommet) and reviewers, who desserve credit for improving our paper.

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Paul Bertin @paulbertin.bsky.social · 31/10/2025

We found robust evidence that lower freedom of speech increases conspiracy beliefs. This effect was consistent across contexts and held even when controlling for perceived levels of democracy, highlighting the specific nature of this relationship.

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Paul Bertin @paulbertin.bsky.social · 31/10/2025

🚨 New paper out in the European Journal of Social Psychology! Across one study using aggregated nation-level data and four preregistered experiments, we examined how freedom of speech within a society influences belief in conspiracy theories.

onlinelibrary.wiley.com

The Impact of Freedom of Speech on Conspiracy Beliefs

Conspiracy beliefs are often portrayed as a threat to democracies. However, less is known about the extent to which the state of democracy may affect conspiracy beliefs. Hence, we investigated the im...

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paulinegrippa.bsky.social @paulinegrippa.bsky.social · 13/06/2025

I am so excited to announce the publication of my first PhD paper, written in collaboration with Laurent Licata and amazing participants! “We Are No Longer the First to Lead the Dance”: Analysing Intergroup Conflicts Within the French-Speaking Belgian Feminist Movement doi.org/10.1002/casp...

doi.org

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Gaëlle Marinthe @gaellemarinthe.bsky.social · 28/05/2025

📢 Thèse en psychologie sociale Le LAPSCO (Université Clermont Auvergne / CNRS) recrute un·e doctorant·e à partir du 1er octobre 2025, dans le cadre du projet ANR IDEOPOL portant sur la polarisation idéologique. 📄 Détail de l’offre et candidature : tinyurl.com/nzw896bf Merci de partager !

tinyurl.com

Portail Emploi CNRS - Offre d'emploi - Thèse en psychologie sociale expérimentale (H/F)

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Paul Bertin @paulbertin.bsky.social · 02/06/2025

Merci à @adrienfillon.bsky.social et @nathlarigaldie.bsky.social pour ce super moment 😊 Version clickbait du titre : ils découvrent en live l'identité du pair qui a expertisé leur papier… leur réaction est incroyable !

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Daniel Lakens @lakens.bsky.social · 29/05/2025

If you work in psychology in a research area without Registered Reports, you will see that the main hypotheses in papers are almost always supported. If your peers publish Registered Reports, you will also have access to null results, which should be very common. doi.org/10.1177/2515...

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AFR-PsyPol @afr-psypol.bsky.social · 15/04/2025

📢 AFR-PsyPol fait ses 1ers pas sur les réseaux ! Nous sommes l'Association Francophone pour la Recherche en Psychologie Politique et avons pour but de promouvoir la recherche et la coopération en #Psychologie #Politique. Envie d'en savoir davantage ? Découvrez nous ici : afr-psypol.org

afr-psypol.org

Promouvoir la recherche et la coopération entre les chercheur·se·s et faciliter le partage du savoir sur la psychologie politique

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Caroline Rowland @carorowland.bsky.social · 28/03/2025

Inspired by my reading this week, I wrote a list of the resources I think every cognitive science researcher should read/listen to about theory development. It's in this google.doc (feel free to add your own suggestions) and in the thread below. docs.google.com/document/d/1...

docs.google.com

Theory: Whtat to read

The role of theory in cognitive science Or: my guide to what to read if you really want to understand how to do good, robust , theory-driven cognitive science. (disclaimer: this is an aspirational gu...

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Boryana Todorova @todorova.bsky.social · 27/03/2025

🚨 New Manylabs launch 🚀 How does extreme heat affect our cognition & social behaviors? Contribute & become a co-author: 🔗 Info: heatandmind.wordpress.com 📋 Sign up: www.soscisurvey.de/HeatandCogni... Please share 🔁 #EnvironmentalPsychology

heatandmind.wordpress.com

The Heat and Cognition Project: The Collective Cost of Extreme Heat

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Kenzo Nera @kenzonera.bsky.social · 24/03/2025

I am super happy to back my most appreciated and trustworthy partner in crime in this great piece (in all objectivity of course)! #metascience #transparency #virtuesignaling

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Paul Bertin @paulbertin.bsky.social · 24/03/2025

This trilemma may have detrimental consequences for open science practices, turning them into a form of virtue signalling that compensates for low transparency. To learn more about the trilemma, its consequences, and potential solutions to alleviate its pressure, check out the open-access article:

rips-irsp.com

Novelty, Consistency, Transparency: The Trilemma of Psychological Sciences and its Consequences on Open Science Practices | International Review of Social Psychology

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Paul Bertin @paulbertin.bsky.social · 24/03/2025

New publication with my dearest friend, @kenzonera.bsky.social! We propose that multi-study articles can hardly achieve conceptual novelty and statistical consistency while remaining transparent. Fulfilling two of these criteria considerably reduces the probability of satisfying the third one.

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Paul Bertin @paulbertin.bsky.social · 17/03/2025

Are there any fully online or hybrid conferences in social/political psychology?

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S/O to YouTubers (Wiloo, Les Outsiderz) and @lequipedusoir.bsky.social journalists (l'immense et regretté Didier Roustan, Guillaume Dufy, Philippe Sanfourche) who shared our survey. Thanks also to @olivierklein.bsky.social for his help in designing nice figures! Preprint: osf.io/preprints/ps...

osf.io

OSF

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Boycott behaviors may be hard for sports fans to maintain due to the lack of alternative products. Ultimately, boycott may reflect low fandom rather than high political engagement. In the end, lasting boycotters may be those uninterested in sports events, making the boycott poorly consequential.

Even more puzzling was the finding that this decrease occurred regardless of French fans' political concerns about minorities and environmental issues—the best predictors of boycott intentions. In other words, politicized fans struggled to maintain the boycott.

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Then, we compared fans' intentions before the WC with their actual boycott behavior after the tournament. We observed a decrease in all countries, but it was only significant in France—likely due to limited statistical power in other countries and the strong performance of the French team.

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We investigated boycott intentions in France, Belgium, Canada, and Switzerland (N = 1,635). Boycott intentions were tied to concerns about environmental and minority issues. Rejection of the boycott was best predicted by strong identification with the team and enjoying football’s aesthetic appeal.

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Valentin Mang @valentinmang.bsky.social · 12/02/2025

New paper on sports fans and political behaviors now in press at bsky.app/profile/ispp... In late 2022, @paulinegrippa.bsky.social and I conducted an intercultural, longitudinal study on fans' motives for (not) boycotting the 2022 World Cup. A 🧵

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🚨New paper alert🚨 How do different "Great Replacement" conspiracy narratives (blaming relatively powerful left-wing elites or relatively powerless Muslim communities) affect radical collective action intentions against different targets across the political spectrum? A 🧵 about what we found:

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Leibniz-Institut für Psychologie (ZPID) @zpid.bsky.social · 27/01/2025

📌This Wednesday is our first colloquium in 2025! @paulbertin.bsky.social speaks on 👉The Trilemma of Psychological Sciences and its Consequences on Open Science Practices 👈 #Opensicence #Trilemma All information also for online participation: leibniz-psychology.org/en/products/...

leibniz-psychology.org

Kolloquium for interested persons

The Trilemma of Psychological Sciences and its Consequences on Open Science Practices

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radhikabutalia.bsky.social @radhikabutalia.bsky.social · 16/12/2024

🌟 Applications Open: Social Identity Summer School 2025! 🌟 PhD students—don’t miss this chance to deepen your understanding of social identity theorising. 📅 Dates: 25 Aug – 1 Sep 2025 📍 Location: KU Leuven 💶 Fee: ± €650 🗓️ Apply by: 31 Jan 2025 📥 Apply here: www.kuleuven.be/english/summ...

kuleuven.be

The Second Social Identity Summer School 2025

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Paul Bertin @paulbertin.bsky.social · 13/01/2025

Dans mon ancienne ED, c'était 3 publiés. J'ai fait du forcing pour pouvoir soutenir avec 2 publiés et 2 soumis. Certaines disciplines ne voyaient pas les thèses articles d'un très bon œil et avaient imposé des critères inatteignables (j'étais la première thèse article soutenue sous ces critères).

Paul Bertin @paulbertin.bsky.social · 26/12/2024

Making materials openly available and easy to retrieve is crucial for facilitating this kind of replication effort and ensuring a healthy development of the field.

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Paul Bertin @paulbertin.bsky.social · 26/12/2024

Glad to see that our research with @kenzonera.bsky.social and @slvdlv.bsky.social is robust! Not very surprising, though: it was a conceptual replication, so not as risky as an original contribution (www.frontiersin.org/journals/psy...).

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Paul Bertin @paulbertin.bsky.social · 27/11/2024

If you’re a researcher in psychology or a related field, please consider participating in Rrita's survey. It’s short, the project is great, and it will help support a brilliant young researcher 👇

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On a personal note, this is my first first-author paper from my research on sports fandom (and not implying any conspiracy!) More to come soon ⚽

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The best always strive to be better. Made in Europe, loved everywhere, the new European Super League aims to be the most exciting football competition in the world.

Our findings supported this model, particularly among Big 6 fans. The ESL story is far from over and could resurface soon. The European Court of Justice recently ruled in favour of the ESL, which A22 Sport Management is currently reshaping: a22sports.com/en/

a22sports.com

A22 Sports Management

We used a social identity perspective to further explore attitudes toward the ESL. We suggested that team narcissists were favourable toward the ESL due to fair-weather fandom tendencies, while long-term identifiers saw it as a threat.

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However, not all fans were against the ESL: attitudes toward the ESL were more positive among fans of the Big 6. Could it be that fans were divided?

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