Marius Mercier
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mariusmercier.bsky.social
Marius Mercier
@mariusmercier.bsky.social
PhD student in Cognitive Psychology | ENS-PSL. Currently working on the dynamics of impression formation, reputation management, and how it impacts our behavior.

https://mariusmercier.github.io
📌 The same Bayesian framework explains information search. Participants flexibly queried new information in ways that match an optimal information-theoretic search model.
November 13, 2025 at 5:16 PM
📌 A Bayesian model best explains these inferences. Participants’ judgments are best described by a Bayesian model that rationally integrates new evidence with prior expectations about others’ competence.
November 13, 2025 at 5:16 PM
Main findings:

📌 People can accurately predict what others know from very limited information. From a single observed answer, participants could predict the probability that someone would know another trivia question with striking accuracy!
November 13, 2025 at 5:16 PM
After seeing an individual’s performance on a trivia question, participants had to either:
- predict the individual’s ability to answer other trivia questions from the same theme, or
- select which information would be most diagnostic for inferring an individual’s competence.
November 13, 2025 at 5:16 PM
🎉 New preprint: Bayesian Competence Inference guides Knowledge Attribution and Information search

If someone knows that Venus is the only planet in the Solar System that rotates clockwise, will they also know what Earth’s only natural satellite is? What about which planets have no moons at all?
November 13, 2025 at 5:16 PM
Nice to see our research featured on the eHRAF Academic Quarterly!

I also discovered some interesting papers that I missed :)
October 16, 2025 at 12:59 PM
Hi! I'm attending #SBDM2025 conference over the next few days. Come find me at Poster #61 if you're interested in computational models of social cognition!

Looking forward to discussing and meeting new people :)
June 16, 2025 at 10:29 AM
I presented this paper at the Explaining Culture Conference last week, and I couldn't resist creating a new plot specifically for the talk.

It's definitely not a good time management strategy to create new plot for each talk, but it's a lot of fun!
June 2, 2025 at 2:41 PM
And it works! Participants exposed to high‑insight stimuli wanted to read more riddles & whodunits, and were even more interested in sharing them.

We speculate that the larger effect on sharing is probably because passing on clever content boosts your reputation.
April 22, 2025 at 2:02 PM
We focus on two popular cultural products: riddles (cross-cultural), and whodunits (Agatha Christie is the best selling author ever).

In 5 studies, we manipulated feelings of insight to test their impact on people's willingness to share and consume these materials.
April 22, 2025 at 2:02 PM
"What goes on four feet in the morning, two feet at midday, and three feet in the evening?"

This riddle is thousands of years old, but why does it stick with us?

In our new paper, we argue that the feeling of insight might explain the lasting success of some cultural products: tinyurl.com/4j756h9a
April 22, 2025 at 2:02 PM
A few photos of this weekend's hike to Royaumont Abbey, near Paris.

(Accessible super easily with public transport from Paris)
March 31, 2025 at 8:56 AM
Before, you could see all the components and the associated pre-registrations in the same view, plus the files from the github repo. It's now a maze to find all the important files for peer-review.
March 25, 2025 at 8:58 AM
A lower rate of publication compared to the PhD also decreases the probability of landing a faculty job:
January 21, 2025 at 4:39 PM
The pre-print is now available here: osf.io/preprints/os...
January 17, 2025 at 9:52 AM
New textbook from Griffiths, Chater & Tenenbaum! Just started to read but it's well written and clear.

Highly recommend!
December 12, 2024 at 10:59 AM
Et comme c'est en open source, y'a une communauté de nerd qui fait des plugins utiles.

Par exemple, j'ai des suggestions grâce à l'IA de mes notes les plus pertinentes pour ce que je suis en train d'écrire (ce que tu vois à droite).
December 9, 2023 at 5:37 PM