David Levari

I'm hoping to recruit a new PhD student to join my lab at Brown (@browncopsy.bsky.social) this cycle. Applications are due Nov 15. Please apply! To read about our whole deal: levarilab.com

An interesting meditation from @paulbloomatyale.bsky.social. My parents would often tell a story about catching their statistics professor in line at the convenience store, buying a lottery ticket. His explanation: "I'm buying hope!" (he did make them promise not to tell the other students.)

💡I’m recruiting a Social Psychology PhD student at Rutgers for Fall 2027 to study how to reduce prejudice and discrimination. More info about my lab, the Diversity Science Lab, can be found at: www.calvinklai.com Please share this post widely and with students who might be a great fit!

Out today in Cognition (@cognitionjournal.bsky.social)! www.sciencedirect.com/science/arti...

I am recruiting graduate students for UCI's PhD in Cognitive Sciences - www.cogsci.uci.edu/graduate/pro... The lab's focus is on how relational structure and combinatorial reasoning is implemented in human brains and large language models--and if they are similar.

We often say that humans struggle to produce random sequences… but what if that's not the whole story? In a new paper, @dorsaamir.bsky.social, @samiyousif.bsky.social & I show that context matters (a lot!). When playing strategic games, humans can produce near-random behavior osf.io/preprints/ps...

New video: A public talk on my lab's work on trust. Trusting other people is essential, but deeply mysterious. Major behavioral science theories say you shouldn't do it, but in our studies people trust complete strangers--and they can't tell you why. www.youtube.com/watch?v=DsH7...

🚨New WP: Protecting users from AI persuasion🚨 🔸A 1-paragraph AI literacy treatment (explaining AIs can be told to pursue non-accuracy goals/to persuade) cuts AI dialogue political persuasion by ~half! 🔸No sig effect on general genAI trust arxiv.org/abs/2609.16432 w/ @rorchinik.bsky.social

Applications due tomorrow!

Interested in doing a postdoc with me & @dgrand.bsky.social? Consider applying to Cornell's Klarman Fellowship: as.cornell.edu/research/kla... It involves a competitive internal application process, but it's 3 years of funding @$80k/year Please email me/Dave if you're interested! Oct 15th deadline

*looking up the number of horses currently alive in the United States* "Why yes, I do consider my research 'interdisciplinary'."

Just used this to download my stuff from OSF and worked great. Can recommend!

Very much looking forward to welcoming a new colleague! We're hiring at both ranks — the senior (Associate/Full) search is open too, applications due Oct 15: apply.interfolio.com/190696

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Here is a clunky but decently functional script to make a local copy of all your private and public OSF projects. You'll have to decide where to keep them. Maybe a flash drive under your mattress? levarilab.com/osf-backup-t...

We're recruiting postdoc fellows in computational neuroscience for Brown's NIH T32 Training Program — brain & cognitive modeling from biophysics to AI, with connections to mental health & psychiatry. US citizens/PRs. Review begins Sept 1. @carneyinstitute @browncopsy apply.interfolio.com/190111

Here is a clunky but decently functional script to make a local copy of all your private and public OSF projects. You'll have to decide where to keep them. Maybe a flash drive under your mattress? levarilab.com/osf-backup-t...

Very excited to share this preprint from me, @emmatempleton.bsky.social, @lindseytepfer.bsky.social & @thaliawheatley.bsky.social! "Friends and strangers engage in distinct regimes of body motion synchrony during conversation" osf.io/preprints/ps...

📢 We're recruiting! 18-month postdoc in civic science & AI-human interaction @BrownUniversity, hosted by ARIA (NSF AI Institute). Bridge computational brain science with community engagement & public impact. Apply by Aug 1: apply.interfolio.com/188112

Live footage of the US Eastern Seaboard: youtu.be/TadK2L0-4-I?...

Now out (for realz) in Cognition: "People Make Graded Judgments About The Inconceivable" (by Hu, Sosa, & me) Free preprint: www.tomerullman.org/papers/grade... Journal link: bit.ly/gradedInconCog @jennhu.bsky.social @cognitionjournal.bsky.social

You press ‘send’ on a high-stakes email but hesitate when lifting your finger. You make a chess move but linger on the piece before letting go. Familiar? In @pnas.org, Hanbei Zhou @ruizhegoh.bsky.social @ianbphillips.bsky.social & I show that response *duration* tracks confidence! shorturl.at/A9NVe

🌵🏜️🌵 Out now in @cognitionjournal.bsky.social with @rbhui.bsky.social! If your advisor sends you an unclear email, do you interpret it as good or bad? 😏😱 In a new paper, we show how people make inferences about this type of ambiguous feedback during learning. www.sciencedirect.com/science/arti...

Out in PNAS pnas.org/doi/10.1073/... Inequality is not only hard to solve. Sometimes, it is hard to *see*. We ask a simple question: Do people notice when members of minority groups are absent? Across field studies and experiments, the answer was often no.

New research thread: 1/ Error messages have always been designed, sometimes painstakingly, for humans. But now we have new "readers" for errors: agentic AI. Should this affect what PLs generate? Can we measure this experimentally? We have some preliminary results: ↵

Pointing out that “everyone else is already doing it!” is a classic way to motivate prosocial behavior. But how can we encourage actions which aren't popular yet? In a new paper in @jexpsocpsych.bsky.social, Mike Norton and I had a lot of fun testing a method using "collective streaks." (1/5)

"I notice that your survey sends bots to an endless purgatory of link redirects. To properly assess potential risks, in your revised protocol please provide a list of all URLs, and clarify whether LLM survey participants are conscious and capable of experiencing psychological anguish."

Complexity is ubiquitous in the world around us. But different stimuli are complex for different reasons. Does the mind nevertheless represent a ‘unified’ notion of complexity across domains? In @nathumbehav.nature.com, @chazfirestone.bsky.social & I show the answer is: yes! osf.io/preprints/ps...

New paper from me at Perspectives on Psychological Science! "Reframing the Performance and Ethics of Empathic AI: Wisdom of the Crowd and Placebos" I use analogies to two classic psychological effects to recast recent findings about the performance of empathy by LLMs. doi.org/10.1177/1745...

What makes adaptive decision-making possible? New preprint connecting cognitive, social, biological, and computational views! w/ Dorst, FeldmanHall, @smfleming.bsky.social, @catehartley.bsky.social, Gottlieb, Lejarraga, Müller-Trede, @angelaradulescu.bsky.social, and Rosati osf.io/preprints/ps...

Now out in PNAS with @jaeyoungson.bsky.social, Alice Xia, @apaxon.bsky.social & @orielf.bsky.social. Medial temporal lobe encodes predictive representations of people's real-world social networks which afford them key advantages in social navigation. www.pnas.org/doi/10.1073/... 🧵

🚨🚨 My lab is hiring a Pre-doc Researcher/Lab Manager! 🚨🚨 Full-time pre-doc research opening in my lab at Harvard Psych (start: Summer/Fall 2026). Review begins April 10 Apply: jobs.smartrecruiters.com/HarvardUnive... Please repost + tag folks who might be a good fit! 👇

out now in Science: @loganjames.bsky.social collected pairs of sounds in 16 species where we *know* which sound is more attractive (to that species) he played them to ppl on themusiclab.org, asking, in each pair, which was nicer. humans agreed w other animals doi.org/10.1126/science.aea1202

New paper out in Child Development (@srcdorg.bsky.social) with Dave Sobel (@candmlab.bsky.social)! ✨ We investigated how 5- to 7-year-old children decide to take on easy versus hard tasks while pursuing a goal. doi.org/10.1093/chid...

Come by to check out our symposium on *Evaluating and predicting performance and learning* this Saturday at #SPSP2026! We have a fun lineup of speakers @stavatir.bsky.social y.social, Evan Weingarten, and @davidlevari.bsky.social

Introducing “Pretend Battleship”: you’re told where all the ships are but then have to play like you never got that information. Could you do it? And what would your performance reveal about your understanding of your own mind? A joy to be part of this creative project led by @matanmazor.bsky.social

🚨New WP "@Grok is this true?" We analyze 1.6M factcheck requests on X (grok & Perplexity) 📌Usage is polarized, Grok users more likely to be Reps 📌BUT Rep posts rated as false more often—even by Grok 📌Bot agreement with factchecks is OK but not great; APIs match fact-checkers osf.io/preprints/ps...

Please contact Nina if you're interested in working with us! Much of this work is also with @dgrand.bsky.social & @tomcostello.bsky.social, and others! Very fun collaborative environment. And Nina is wonderful to work with!! (She is also the coolest among us, FWIW)

The Visual Learning Lab is hiring TWO lab coordinators! Both positions are ideal for someone looking for research experience before applying to graduate school. Application deadline is Feb 10th (approaching fast!)—with flexible summer start dates.