Dominik Deffner

@dominikdeffner.bsky.social

Assistant Professor for Computational Modelling of Behaviour @unimarburg.bsky.social | Collective decision-making and cultural evolution | https://www.uni-marburg.de/en/fb04/team-deffner/copy_of_deffner

New preprint w/ Leo Tiokhin & @lakens.bsky.social! Registered Reports (RRs) are great for science b/c publication is guaranteed before results are known, reducing publication bias & QRPs. This feature supposedly also makes them great for *scientists*. But is that really true? 1/ tinyurl.com/4sy993rr

Career incentives make Registered Reports unattractive under realistic academic conditions

Registered Reports are a publication format designed to reduce publication bias by guaranteeing publication before results are known. This guarantee is considered attractive in the prevailing ‘publish...

tinyurl.com

Learning from the most successful people makes sense? We show that social learning, and especially payoff bias, is bad when choice outcomes are dependent on prior success💰 As such "rich-get-richer" dynamics are everywhere, this shows fundamental boundary conditions for the benefits of SL!

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Paul Bergmann@pkbergmann.bsky.social · 4w ago

New preprint with @dominikdeffner.bsky.social: While social learning is broadly adaptive when repeated decision outcomes are independent, we show that when outcomes depend on prior success, most social learning strategies deteriorate performance and increase inequality: doi.org/10.31234/osf... 1/7

Happy to have contributed to the latest HBES newsletter on our recent paper, The Meanings and Dividends of Man the Hunter, led by @vivek123.bsky.social I reflect on MTH through the lens of my research on Bayaka women's foraging & cooperation in the Congolese rainforest www.hbes.com/revisiting-m...

Revisiting Man the Hunter - HBES

– by Haneul Jang For decades, the phrase Man the Hunter has occupied a central place in discussions of human evolution. Today, however, the phrase sounds outdated, evoking a familiar image of men hunt...

hbes.com

Look how far we've come in just a few years! We're fast as well! It turns out, recruiting reviewers is much easier when they're not being used as free labor for massively profitable publishers Support free-to-publish and Open Access science by submitting to Open Mind today! direct.mit.edu/opmi

Open Mind | MIT Press

direct.mit.edu

Llanguagemit.bsky.social@languagemit.bsky.social · 2mo ago

—— Open Mind is MIT Press’s Diamond Open Access Cognitive Science journal. We now have our first Impact Factor: 2.9 as of June 2026 Submit your papers to Open Mind direct.mit.edu/opmi

Move over, GLM-HMM—there’s a new hidden Markov model in town. In our new preprint, we introduce the DDM-HMM: a model that jointly infers latent decision states from reaction times and choices. Using 24-hour behavioral data from rats, we found that evidence accumulation changes with time of day!

bioRxivpreprint@biorxivpreprint.bsky.social · 2mo ago

Diurnal rhythms of choice: a novel state-dependent drift diffusion model uncovers time-dependent changes in rat decision making https://www.biorxiv.org/content/10.64898/2026.05.25.727672v1

🎉🦜NEW PAPER ALERT 🦜🎉 Which social learning biases underly the acquisition of novel food in wild parrots ? We (@lucymaplin.bsky.social, @bjjbarrett.bsky.social, @sonjawild.bsky.social, @drjohnmartin.bsky.social) presented >700 cockies with a novel, artificial food (🧵1/6)

PLOS Biology@plosbiology.org · 3mo ago

Adopting novel food is vital to colonize novel environments, but what is the role of social learning? Study of urban #cockatoos by @clevercockierp.bsky.social shows them to rapidly adopt novel food via #SocialLearning, with juveniles showing conformist preferences @plosbiology.org 🧪 plos.io/4uq6NVq

A sulphur-crested cockatoo foraging on a novel food item (coloured shelled almond). Image credit: Julia Penndorf

We're looking for a new postdoc to join our team! Do you enjoy conceptualizing, improving, and rethinking empirical methods training for social scientists? Then this job might be for you 😊 Feel free to share among your network and to reach out if you have any questions!

GESIS Training@gesistraining.bsky.social · 4mo ago

Postdoc-Stelle im Team Training: 100 % (4 Jahre), Mannheim oder Köln. Fokus: Konzeption & Koordination von Trainings in den Methoden der empirischen Sozialforschung, mit Möglichkeiten zur internationalen Vernetzung. 30 % Forschung, frei gestaltbar. Jetzt bewerben ➡️ t1p.de/joboffer_KEO...

We're hiring! Join our team

I've been thinking a lot about the foundations of cultural evolutionary theory. While there's been a lot of work on transmission mechanisms, there has been far less work on cultural *selection*. Here's a new working paper presenting a taxonomy of cultural selection processes. osf.io/preprints/so...

Title page for working paper: "The Varieties of Cultural Selection"

New blog just dropped! This one is all about estimators—we cover James-Stein, classical test theory, empirical Bayes, penalized regression, and hierarchical models, showing how they all can be used to do a better job than sample stats alone 🤓 haines-lab.com/post/how-to-...

How to Estimate a Mean, and What It Means for Science | Computational Psychology

Introduction If I asked you to estimate 30 means, you would probably compute 30 sample means. And you would be provably wrong (well.. maybe not wrong, but at least provably inefficient).

haines-lab.com

We are hiring a tenure track (!) senior researcher in political economy! This is obviously a great job (permanent without teaching obligation) and I hope you all apply. However, I would like to take a moment to share just how significant this is in the German academic context ⬇️

Max-Planck-Institut für Gesellschaftsforschung (MPIfG)@mpifg.bsky.social · 4mo ago

📢 Call: Tenure Track Position The MPIfG Political Economy Research Area led by Lucio Baccaro is seeking a Senior Researcher. Open to candidates with at least two years’ postdoc experience. Please share widely! 🗓️ Apply by April 20, 2026 s.gwdg.de/WPMPp1

Tenure Track Position: Senior Researcher, Political Economy. Application Deadline. April 20, 2026