Thank you so much!!

authors list

And of course, thank you to all other co-authors who helped us sharing and interpreting their data! This was a truly collaborative effort! Forgive me I cannot list you all!!

Finally, big thanks to @stir.ac.uk and @mpi-eva-leipzig.bsky.social for their support!

I would especially like to thank my closest collaborators Sonja, Carin, Akzira, and Lizbeth. Without them, this project would not have been possible. I would also like to thank the PIs Mike, Katja, Josep, and Daniel for their support throughout the years.

We hope the EVApeCognition Dataset will be valuable to anyone interested in how our closest living relatives think and behave, inspiring researchers and teachers alike to develop future projects, ideas, and methods for studying these wonderful animals

Largest open dataset of great ape cognition New resource makes 18 years of ape cognition research accessible for science and education

See our press releases here for more info www.mpg.de/26395591/lar...

www.stir.ac.uk/news/2026/ap...

as well as the Dataset itself in Zenodo zenodo.org/records/1884... and Github github.com/ccp-eva/EVAp...

Not a secret anymore! I am extremely proud and happy to present you the EVApeCognition Dataset, out now in Scientific Data.

Over the last 5 years we have assembled and standardized data from 150 studies on great ape cognition from the WKPRC in the Leipzig Zoo!

www.nature.com/articles/s41...

Thank you so much tor inviting me to represent @manyprimates.bsky.social at #ehbea2026. A bit intimidating but very enjoyable to give my first talk as network co-coordinator.

I'll only join virtually and miss out on beautiful Leiden, but if you're at @ehbea2026.bsky.social do join our symposium on Thursday afternoon and chat about big data and big team science.
Looking forward to it and to representing @manybabies.org

PhD Opportunity working with @shona-d.bsky.social and me on the development of children’s collaborative problem-solving skills. This is an Academic Associate position (PhD + teaching) for 4 years. Full details here: jobs.yorksj.ac.uk/vacancy.aspx.... Please get in touch with any queries.

Glad to share our new study led by @kirstensutherland.bsky.social. We have investigated how chimpanzees solve common pool resources using a novel group paradigm. Find more in Kirsten's post

Chimpanzees are better at solving resource dilemmas in larger, more tolerant groups. Cooperation & tolerant leadership matter. Study @commspsychol.nature.com by @kirstensutherland.bsky.social, @dbmhaun.bsky.social & @alex-primate.bsky.social See: tinyurl.com/yzmheb5d & www.nature.com/articles/s44...

#Chimpanzees and children are curious about social interactions #ProcB #OpenAccess #Behaiour royalsocietypublishing.org/doi/10.1098/...

Chimpanzees and children are curious about social interactions | Proceedings of the Royal Society B: Biological Sciences Curiosity is adaptive, enhances learning, and reduces uncertainty. Social curiosity is defined as the motivation to gain information about the actions, relationships, and psychology of others. Little ...

New paper just dropped🎉 With novel "Curiosity Boxes", we find that chimps & children are very curious about social interactions, & some even give up a reward to gain info! Fun collaboration with @alisongopnik.bsky.social, @janengelmann.bsky.social & others royalsocietypublishing.org/doi/10.1098/...

Chimpanzees and children are curious about social interactions | Proceedings of the Royal Society B: Biological Sciences Curiosity is adaptive, enhances learning, and reduces uncertainty. Social curiosity is defined as the motivation to gain information about the actions, relationships, and psychology of others. Little is known about the developmental and evolutionary roots ...

New paper from Laura Lewis and Jan Engelmann et al. (including me) with a clever new method. Chimps and kids will forgo reward to get a chance to look at social interactions
royalsocietypublishing.org/doi/full/10....

Bonobos react negatively to inequity Bonobos refuse to participate when faced with unequal rewards, reinforcing the highly contentious debate about inequity aversion in animal

#Bonobos react negatively to #inequity and are less willing to participate when they receive a worse reward than a partner. Study by Kia Radovanović, Daniel Haun, @ejcvanleeuwen.bsky.social & colleagues in @royalsocietypublishing.org. #fairness tinyurl.com/3u3w87pw & doi.org/10.1098/rspb...

I'm looking for a PhD Student at the intersection of Machine Learning and Developmental Psychology.

We study everyday experiences in children from 🇰🇪🇩🇪🇹🇷 and use ML models to quantify interactions.

4 years, fully funded, great team, beautiful location. Please share and apply!

tinyurl.com/2mafdyh4

BEHOLD THE FLAGSHIP PAPER OF MY PHD! 🚢 I trained wild and zoo housed Guinea baboons to pull a lever for peanuts to test whether they monitored the foraging skills of others and used the information to inform their social choices 🧵 (1/9) royalsocietypublishing.org/doi/10.1098/...

MacaqueNet: Advancing comparative behavioural research through large‐scale collaboration We present MacaqueNet, a global community of macaque researchers who developed the first publicly searchable, standardised database on affiliative and agonistic behaviour. This cross-species database...

So exciting to see MacaqueNet out into the world! 🤩

Learn about our global community & database centralizing standardized affiliative & agonistic data from 61 populations across 14 macaque species: doi/10.1111/1365...

Explore >600 networks & request data: macaquenet.github.io/database/

📢 Job alert: My department is advertising *two* permanent Lectureships in any area of psychology (including Origins of Mind) @ Univ of St Andrews, UK. Please circulate! #PsychSciSky #Psychology #AcademicSky #EHBEA @eslr.bsky.social

Deadline: 06/09/24 www.vacancies.st-andrews.ac.uk/Vacancies/I/...

Studying Great Apes and Cultural Diversity To Understand the Human Mind Psychologists want to understand how the human mind is extraordinary among animal minds and where the unique aspects of human minds and behaviors come from. To build scientific understanding of human ...

I am very delighted for this one! here is our latest work with Dustin Eirdosh and Daniel Haun. I hope all the children around you enjoy it!!
kids.frontiersin.org/articles/10....

We suggest that competitive altruism in chimps does not emerge just as a by-product of them trying to increase over previous losses. Chimps might consider how others’ affect their outcomes and engage in strategies to maximize their chances of being selected as cooperative partners.

Under specific conditions, chimps outcompete first proposers in triadic consecutive trials before the responder could choose which offer to accept.
They did so by offering more than what was expected if they acted randomly or offered the smallest possible amount.

We explored whether chimps engaged in competitive altruism in a triadic UG where two proposers could send offers to a responder who could only accept one offer.
They could make offers simultaneously or consecutively. We ran dyadic control trials where only one ape could offer.

Chimpanzees engage in competitive altruism in a triadic ultimatum game - Scientific Reports Partner choice promotes competition among individuals to be selected as a cooperative partner, a phenomenon referred to as competitive altruism. We explored whether chimpanzees engage in competitive a...

Finally, something to post in Bluesky! I am happy to share our latest work with Luke Maurits and Daniel Haun in Scientific Reports. link.springer.com/article/10.1...