No matter where they live, kids cooperate according to their community’s social norms by middle childhood. Learn more in #ScienceAdvances: https://scim.ag/4r0Rxga

Thrilled to share our latest paper, out now in Science Advances! We explored the development of cooperative behaviors — fairness, trustworthiness, forgiveness, & honesty —  across five societies, culturally contextualizing them & seeing how they correlate. (1/5) www.science.org/doi/full/10....

Very excited that this paper is out! www.science.org/doi/full/10.... Led by the fabulous @dorsaamir.bsky.social with invaluable contributions from many awesome collaborators.

Why do otherwise rational people disagree about the same evidence? Our new paper finds that group membership is a deeply rooted influence on how we form beliefs, leading even preschoolers to bias their evidential standards and form inaccurate beliefs. www.nature.com/articles/s41...

"The relationship between childhood exploration and population-level innovation in cultural evolution" with @ndersen.bsky.social @sheinalew.bsky.social @felixthehauskat.bsky.social out in Proc B royalsocietypublishing.org/rspb/article...

A fascinating & damning exposé on Oliver Sacks, author of “The Man Who Mistook His Wife for a Hat”. It turns out, by his own admission in his private journals, that much of his work was akin to “fairy tales” — based on “lies”, “falsifications”, & “fabrications”. www.newyorker.com/magazine/202...

Did I spend about an hour making this title slide? Yes. Did it come at the cost of prepping the actual talk? It did. But.. was it all worth it in the end? No, no it wasn't.

In the running for greatest human accomplishment.

Wheeled toys were all the rage in the ancient world. Here are four lovely examples: a Greek horse, a Mesopotamian ram, an Iranian hedgehog & a Mesoamerican jaguar. The jaguar one is particularly cool because it shows that Mesoamericans knew about wheels; they just didn't use them for transport.

Somehow I spoke to more anthropologists for my silly little podcast than Yuval Harari did for his bestselling book

Really enjoyed chatting with @michaelhobbes.bsky.social for this episode! In addition to being a delight to talk to, Michael was _extremely_ committed to getting the facts right & engaged very earnestly with our feedback. A scientist's dream.

⚠️ New Postdoc or PhD position open (3 years+) ⚠️ 🚩Developmental milestones across cultures 🌍 Based @leuphana.bsky.social , in collaboration with @mpi-eva-leipzig.bsky.social Please share/apply! Link: tinyurl.com/58dsn43u

Fully funded #PhDposition in Comparative Cultural Psychology @mpi-eva-leipzig.bsky.social. We will use touchscreen experiments & eyetracking to study mental simulations in nonhuman apes & human children across different cultures. All info here: www.eva.mpg.de/career/posit... Please share / apply!🙏

Child’s tunic with hood, Egypt, ca. 600-900 AD. Turns out hoodies have been around for a while!

In a world without forest and creeks, where do the children play? My new essay explores peer cultures and the strangeness of Western childhood. Heavily inspired by work from @dorsaamir.bsky.social and Sheina Lew-Levy :) open.substack.com/pub/unpublis...

Really enjoyed this podcast with @sheinalew.bsky.social and @dorsaamir.bsky.social on evolution and childhood. Super-smart people talking about a super-interesting topic podcasts.apple.com/gb/podcast/m...

Another great PhD opportunity: An ERC-funded project on “Children as agents of cultural evolution,” lead by @sheinalew.bsky.social at Durham University. Come do fieldwork with Mayan groups in Belize with her, @dorsaamir.bsky.social, and I! One of three, 3-year PhD positions starting Fall 2026.

1/ Alright, this one’s been sitting in my drawer for a year now, after @mcxfrank.bsky.social and I got turned down for a public commentary. But before I forget about it completely, here’s the preprint: Can we harvest insights for rice theory from two state farms in China? osf.io/preprints/ps...

Spread the word: I'm looking to recruit a PhD student for Fall 2026 to @ucsb.bsky.social! Reach out if you are applying this cycle and hoping to study infant and child social cognition, specifically expectations about friendship and/or groups. Bonus: live in paradise! And.. 1/3

This is a big one! A 4-year writing project over many timezones, arguing for a reimagining of the influential "core knowledge" thesis. Led by @daweibai.bsky.social, we argue that much of our innate knowledge of the world is not "conceptual" in nature, but rather wired into perceptual processing. 👇

Every developmental psychologist Is like “but my lecture slides!”

If you could win a prize by guessing the number on a die 🎲 hidden under a cup, would you want to guess before the die was rolled, or after? The odds of winning are the same in both, but they can feel different. 🧵

While this looks like it could have been painted yesterday, it’s actually a 1,700 year old (!) portrait from a Fayum mummy in modern day Egypt. This is one of ~900 of these portraits from the era, which broke from a more stylized tradition, and represented the subject more naturally.

@durhampsych.bsky.social current has 5 (FIVE!!) PhD studentships being advertised! 3 to work with me on children as agents of cultural evolution 2 to work with @drboothroyd.bsky.social on examining school-based body image interventions. Please share and apply! www.durham.ac.uk/departments/...

Been reading recently about attempts to circumnavigate the globe & how 16th century ships pulled it off. Steering a ship was complicated & relied on hundreds of adjustments to complex rope systems. So, it often took a new sailor a long time to..... "learn the ropes"! So that's where that comes from.

Do you fall for the Müller-Lyer optical illusion? Psychologists had long thought that it depends on your cultural background—the famous "carpentered-world" hypothesis. Now, that hypothesis is widely disputed. Here's why. 🧪 by @norabradford.bsky.social www.scientificamerican.com/article/does...

Why do societies reliably develop strikingly similar traditions like dance songs, hero stories, shamanism & justice institutions? In a new BBS target article, I propose a theory for such "super-attractors" + cultural evolution more broadly. Now open for commentary: www.cambridge.org/core/journal...

A little write-up of our Psych Review paper (with @chazfirestone.bsky.social) on culture and visual illusions — out now in Slate! 👇

Thanks so much @dorsaamir.bsky.social and @chazfirestone.bsky.social, along with @mcxfrank.bsky.social, for your input on this! And ofc @sarahexplains.bsky.social and @parshallison.bsky.social for your editing!

How much does the environment we’re raised in change how we see the world? Wonderful piece in @sciam.bsky.social by @norabradford.bsky.social, ft. an interview with @dorsaamir.bsky.social about our work on the 'cultural byproduct hypothesis'. www.scientificamerican.com/article/does...

Children are often cast as passive vessels into which we pour culture. But children create cultures of their own—vibrant ones with special properties. Just one of the topics discussed in our recent episode with @dorsaamir.bsky.social & @sheinalew.bsky.social! Listen: disi.org/varieties-of...

Nothing like having fraternal twins to realize how big individual differences are. All baby advice seems to assume that babies are interchangeable but let me tell you: we treat them exactly the same & it is incredibly clear that they are two _very_ different people with very different preferences.

This was such a fun conversation about childhood, play, and agency across cultures. Thanks for having @sheinalew.bsky.social & I on the show!

New episode!! 🎙️📣 A chat w/ @sheinalew.bsky.social & @dorsaamir.bsky.social about childhood across cultures. Humans everywhere go through childhood—a time of learning, growth, and play. But this universal stage of life can look very different in different places. Listen: disi.org/varieties-of...

i think our arguments are more like precision instruments but ok fine i will accept "sledgehammer" (@dorsaamir.bsky.social @anilseth.bsky.social @theguardian.com)

Look what you could publish (anonymously) in Nature in 1970.

Fish see visual illusions the same way humans do. Flies too. And bees. This changes everything about the WEIRD sampling debate in cognitive psychology. New post on @dorsaamir.bsky.social and @chazfirestone.bsky.social's devastating paper.

🥳🥳 New paper in @nathumbehav.nature.com: “When development constricts our moral circle." Contrary to popular belief, younger kids may start out with broader moral circles than older ones. Check it out here 👉 rdcu.be/eoaSe w/ @mattiwilks.bsky.social @karrineldner.bsky.social & Lucius Caviola

Many of us have heard of Hofstede's cultural dimensions (e.g. the individualistic-collectivist (IC) dimension), but few have looked under the hood of how they were constructed. The data, it turns out, come from self-report surveys of IBM employees ca. 1968-72. Here's McSweeney describing the sample:

Out today!

Made a "graphic syllabus" this year to encourage students to actually, you know, read the syllabus and maybe even use the information. Stay tuned for results! Here's a link to the Keynote file if you wanna try it out 👇🏼 drive.google.com/file/d/1K6W-...

Looking at Van Gogh’s Starry Night, we see not only its content (a French village beneath a night sky) but also its *style*. How does that work? How do we see style? In @nathumbehav.nature.com, @chazfirestone.bsky.social & I take an experimental approach to style perception! osf.io/preprints/ps...

I'm THRILLED that our book is out. This book, with other 60 contributors from across the globe (!!!) is a love letter to the science we want to do, and a how-to guide for how to do it. Please read it and share it!

Wanted to share a handy little resource with you all (especially those in dev psych) — my lab & I made a "journal submission cheat sheet" that summarizes article types, word limits, & other requirements for the journals we typically submit to. Link below 👇🏼 docs.google.com/spreadsheets...

1/ 🧵 🚨New paper!🚨 Cross-cultural research is expanding in the social sciences — but are we measuring what we think we are? Our recent paper argues that construct validity is an overlooked challenge, especially in developmental research. Let’s break it down. 🌍 🧠 www.cambridge.org/core/journal...

The looks great: “cross-cultural developmental research poses distinct problems for ensuring high construct validity, owing to the nuances of working with children; the standard approach of transporting protocols designed & validated in one population to another risks low construct validity”

Are you a junior faculty member interested in spending 2-4 weeks at Princeton Psych? Please apply for our Microsabbatical program! It’s a fully funded visit for professional development and creating long-term collaborations. psych.princeton.edu/diversity/mi...

Now hiring for two lab manager positions at Stanford! Hyo Gweon and I are coordinating joint searches since our labs collaborate frequently. Please join us! careersearch.stanford.edu/jobs/researc... and careersearch.stanford.edu/jobs/lab-coo...

🏰 PhD position on computational modelling | collective dynamics | cultural evolution 🏰 Get in touch with any questions you might have and join me in beautiful Marburg! stellenangebote.uni-marburg.de/jobposting/c... (Deutsch) stellenangebote.uni-marburg.de/jobposting/3... (English)