Dominik Deffner

This is an outstanding book, especially for fathers(-to-be)!

@ehbea.bsky.social @culturalevolsoc.bsky.social @eslr.bsky.social

Come work with us! And get in touch with any questions you might have about the position, our labs or living/working in Germany #PostdocWanted

🤩PREPRINT OUT! Using our causal model of 👫 growth, we test if model can estimate growth trajectories of pops. of 🚸 of uncertain age using cross-sectional data. Results: our model provide accurate estimates providing a solution for bioarcheological and other contexts!
www.biorxiv.org/content/10.6...

✨New Perspective out w/ Wenning Deng and @fearbrain.bsky.social in @cp-iscience.bsky.social ! We argue that social foraging gives us a unifying, and ecologically grounded way to study how decisions unfold across levels — from individuals and dyads to collectives.

www.cell.com/iscience/ful...

Many Minds: Seven metaphors for AI If you wanted a petri dish for understanding metaphors—how they emerge and evolve and jostle with each other—it would be hard to do better than the world of AI. We talk about AI systems variously as c...

I enjoyed talking with @kensycoop.bsky.social on the Many Minds podcast about the metaphors we use to conceptualize AI.

manyminds.libsyn.com/seven-metaph...

Screening, sorting, and the feedback cycles that imperil peer review The process of peer review is vital to contemporary science, but is also under enormous strain. This study uses mathematical models to dissect the threats to the long-term viability of peer review, su...

1. Kevin Gross and I have a new paper out today PLOS Biology.

We used economic models based around screening games and the market for unpaid labor to highlight a meltdown cycle threatening peer review.

**Postdoc position in human category learning**

@thecharleywu.bsky.social, Frank Jäkel and I are seeking a postdoctoral fellow to lead a joint project on human category learning at the Centre for Cognitive Science @tuda.bsky.social.

www.career.tu-darmstadt.de/tu-darmstadt...

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...

Yeah, in the intro of the main text, we also wrote that foraging, cross-culturally, is considered a social activity...

The Original Affluent Society? Lessons from 60-Years of "Man the Hunter" Research To mark the 60th anniversary of the 1966 'Man the Hunter' symposium, On Humans is proud to publish the first-ever podcast interview with Richard B. Lee.

It's out: the first ever podcast interview with Richard B. Lee! 🥁

We discuss the 60 year legacy of Man the Hunter conference, including:

The Original Affluent Society
The Dawn of Everything
The choice of the term "Man" in the conference name.

Enjoy!

as I'm revising my course materials, I keep stumbling upon cool @mc-stan.org developments.

Current favorites:
1. your model has funnels and you exhausted reparametrization ideas: metric = "dense_e" makes your HMC learn about covariance btw parameters. Sloooow, but effective!
1/

Very happy to see our ice-fishing paper on the cover of @science.org this week! 🎣🎉

We tracked large groups of Finnish competitive ice-fishers to study how social foragers use social information when searching for resources. 🐟

Link: www.science.org/doi/10.1126/... (contact me for open access)

The social learning and development of intra- and inter-ethnic sharing norms in the Congo Basin Compared to other species, the extent of human cooperation is unparalleled. Such cooperation is coordinated between community members via social norms. Developmental research has demonstrated that ver...

🚨 New Paper Alert!

We investigated the developmental trajectories of intra-ethnic and inter-ethnic social norm acquisition among BaYaka and Bandongo in northern Rep. Congo, a community where inter-ethnic cooperation is common. We found that...

journals.plos.org/plosone/arti...

The relationship between childhood exploration and population-level innovation in cultural evolution Abstract. The societal effects of children’s learning in cultural evolution have been underexplored. Here, we investigate using agent-based models how a pr

"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...

@pkbergmann.bsky.social

An email from Martin Peterson to university administrators.

Martin Peterson's creative response to being banned from teaching Plato (shared with his permission).

Simulation-based inference with deep learning suggests speed climbers combine innovation and copying to improve performance Abstract. In the Olympic sport of speed climbing, athletes compete to reach the top of a 15 m wall as quickly as possible. Since the standardization of the

Proc B with @sampassmore.bsky.social! We used simulations to explore the innovation strategies of speed climbers 🧗‍♀️ Innovation is higher among slower athletes and lower when the population size is larger, and the overall balance of innovation and copying appears to be suboptimal 🔗 bit.ly/499QjZM

Happy new year! I wanted to share my new Python package called chatter that streamlines the process of applying AI/ML models to animal communication 🦜🦇🐋🐵👨‍🌾 masonyoungblood.github.io/chatter/

Zeitungsauszug: "Der LMU Career Service veranstalte rund 80 Events im Jahr für alle Branchen und Berufe, darunter eine KI-Akademie, die sich auch an Studenten richtet, die noch nicht so gern prompten, weil sie lieber selbst for-, mulieren und denken wollen."

Angebote für Studierende, "die noch nicht so gern prompten, weil sie lieber selbst formulieren und denken wollen."

Dazu fällt mir auch nichts mehr ein.

STbayes: An R package for creating, fitting and understanding Bayesian models of social transmission A critical consequence of joining social groups is the possibility of social transmission of information related to novel behaviours or resources. Network-based diffusion analysis (NBDA) has emerg...

🎉🍾 very excited to see this out before 2025 ends doi.org/10.1111/2041... with Will Hoppitt in @methodsinecoevol.bsky.social. This paper is an overview of our new R package STbayes, a user-friendly toolkit for performing Bayesian NBDA analyses. @cbehav.bsky.social @mpi-animalbehav.bsky.social

Happy to share this early Christmas present 🎄: our paper about geometry- and locomotion-dependence of 3D memory got published in PNAS! Joint work with co-first-author Volker Reisner (@reisnerv.bsky.social) as well as Leonard König, Misun Kim & Christian Doeller
www.pnas.org/doi/10.1073/

Gene-specific selective sweeps are pervasive across human gut microbiomes - Nature Development and application of the integrated linkage disequilibrium score (iLDS) reveals both selective pressures impacting the human gut microbiome and the mechanisms by which gut bacteria adapt to ...

Grateful to share our paper on gene-specific selective sweeps in human gut microbiomes, now out in Nature! It has been a joy to work with @rwolff.bsky.social, whose insights and hard work made this possible.
www.nature.com/articles/s41...

Postdoctoral Researcher in Quantitative Psychology / Data Science in Psychology

Interesting postdoc position on modeling psychological resilience at the DKFZ Hector Cancer Institute, Mannheim:

jobs.dkfz.de/en/jobs/1682...

--> dynamic/latent-variable models, Bayesian hierarchical models, causal inference, time-series analysis, cognitive modelling

Ending 2025 strong—new paper out today in #ProcB!
Dynamic strategic social learning in nest-building zebra finches and its generalizability 🐦🌿🧠👩‍💻
Preprint thread below 👇
Paper: royalsocietypublishing.org/rspb/article...

We're doing the final sprint, and I think we're able to send the PDF of the forthcoming Bayesian Workflow book to the publisher in the next two weeks (500+ pages), which would mean it would be published some time next year

Psychologists, what are your favorite (open) data sets for teaching multilevel modelling? I have a lot of observational examples, would love a therapy RCT with varying effects for therapists or some such.

It's out!!

www.science.org/doi/10.1126/...

Big thank you to my coauthors @small-schulz.bsky.social and @lorenzspreen.bsky.social, and to all participants who discussed 20 political issues over 4 weeks in 6 subreddit, 3 experimental conditions and let us observe.

Christmas came early this year! Very happy to see our paper out in Science Advances. Led by @lfoswaldo.bsky.social, we ran a unique collective field-experiment on Reddit, to better understand who is participating in online debates and why.

Paper: www.science.org/doi/10.1126/...

And more below 👇

course schedule as a table. Available at the link in the post.

I'm teaching Statistical Rethinking again starting Jan 2026. This time with live lectures, divided into Beginner and Experienced sections. Will be a lot more work for me, but I hope much better for students.

I will record lectures & all will be found at this link: github.com/rmcelreath/s...