🚨 REGISTRATION OPEN CBEN 🚨 📍 Agora Building, Leiden University — Wassenaarseweg 52, 2333 AK Leiden, The Netherlands REGISTER HERE (deadline Feb28th): shop.paylogic.com/eb3d9c2915b7... See also here for more info: www.cognitionbehaviorevolution.nl Preliminary programme👇

We are excited for our upcoming CBEN preconference in Leiden on April 14th on “Socio-Ecological Variation in Conflict and Cooperation”. Keynotes: Daniel Balliet, Elisabetta Palagi. Submit your abstract by Nov 30. More info can be found here: www.cognitionbehaviorevolution.nl?p=1120

🚨 Excited to share our new paper in @nathumbehav.nature.com! In a cross-societal online behavioural experiment with 3,371 participants in 13 societies, we found that perceived societal honour norms predict both greater competition and greater cooperation. 🔗 www.nature.com/articles/s41... 1/9

📈 New research: Financial scarcity is associated with less perceived control over one's life, but cultural values may be more effective than formal institutions in buffering individuals against these psychological effects. Read more in #SPPS: ow.ly/uB6050WuAAb

🚨New article in Proc B: "Reciprocity evolves more readily in competitive than cooperative socio-ecologies" Using agent-based evolutionary models, we show that reciprocity emerges more reliably in competitive environments with high exploitation risk. 🔗 royalsocietypublishing.org/doi/10.1098/...

🚨New article in Proc B: "Reciprocity evolves more readily in competitive than cooperative socio-ecologies" Using agent-based evolutionary models, we show that reciprocity emerges more reliably in competitive environments with high exploitation risk. 🔗 royalsocietypublishing.org/doi/10.1098/...

Do you study cooperation and how it varies across societies, including those that are under-represented? Are you interested in how AI is fundamentally reshaping human cooperation? If so, don’t miss our special issue on Current Directions in Social Dilemmas Research

We're thrilled to announce the winners of this first edition: - Dr. Sisi Wang - Assistant Professor Matthias Nau - Assistant Professor Giuliana Spadaro

Excited this week to present "The Nasty Neighbor Effect in Humans" @imebess.bsky.social: Contrary to coop situations, when interacting with ingroup members in comp situations, humans are actually nastier with ingroups than outgroups. More can be found here: www.science.org/doi/full/10....

🏳️📝 Giuliana Spadaro and I are looking for someone who can assist us with the Rumanian translation of study materials for a cross-cultural study on corruption and social decision-making. We need your help to spread our call to any potentially interested person!📣

An open letter supporting the international bachelor’s psychology programs threatened for cuts. Proceeding with these cuts would damage some of the most important and impactful psychology departments globally. #supportdutchpsychology openletter.earth/against-lang...

Hi Everyone, Angela Dorrough, Giuliana Spadaro, @shuxianjin.bsky.social, and I are guest-editing a special issue at JESP on current directions in social dilemmas research. More info can be found here: www.sciencedirect.com/special-issu... We look forward to receiving many exciting submissions!

Hi Everyone, Angela Dorrough, Giuliana Spadaro, @shuxianjin.bsky.social, and I are guest-editing a special issue at JESP on current directions in social dilemmas research. More info can be found here: www.sciencedirect.com/special-issu... We look forward to receiving many exciting submissions!

🚨Excited that our meta-analysis is out in JPSP @APA_Journals. We synthesized 6 decades (1958-2017) of empirical evidence on social dilemmas and tested which structural features (most strongly) promote cooperation: doi.org/10.1037/pspi... 1/10

See call for translators for a cross-cultural study on corruption and social decision-making 👇

🚨🚨New paper out at with Jörg Gross & @dedreu.bsky.social: The nasty neighbor effect in humans. Across 51 societies and >14,000 participants, and against pre-registered predictions, we find that humans compete more within than between groups: www.science.org/doi/10.1126/...

Join us on Friday for the first Cooperation Colloquium of the autumn semester! Angelo Romano @aromano.bsky.social The nasty neighbour effect in humans Sep 6, 15:00 UTC+2 / 9 am ET Sign up here: list.ku.dk/postorius/li...

We are delighted to announce the Autumn 2024 Cooperation Colloquia! With @aromano.bsky.social, Young-eun Lee, @lfitouchi.bsky.social, @arkadykonovalov.bsky.social, @davidschultner.bsky.social, Hirotaka Imada, Astrid Dannenberg Sign-up here: list.ku.dk/postorius/li...

In-group cooperation coexists with neighbour nastiness—research by @aromano.bsky.social et al found participants competed more when paired to others with the *same* group affiliation than when paired to others with an “out-group” or unknown affiliation: buff.ly/3XNPC2X

🚨🚨New paper out at with Jörg Gross & @dedreu.bsky.social: The nasty neighbor effect in humans. Across 51 societies and >14,000 participants, and against pre-registered predictions, we find that humans compete more within than between groups: www.science.org/doi/10.1126/...

Does indirect reciprocity foster or undermine large scale cooperation between groups? And is indirect reciprocity bounded by group membership? Take a look at our recent comment: www.pnas.org/doi/10.1073/...

Thanks to JEP:G, my collab. Ruthie Pliskin & Carsten De Dreu, and some constructive reviewers, our paper sees the light of day! Honoring that humans often have multiple public goods in which they can choose to invest resources, we explore the realm of ✨multiple-public-goods provision problems✨

We are thrilled to curate a Special Issue on “Field Experiments to Reduce Inequality” in the European Economic Review! Guest editors: @lergetporer.bsky.social @michelebelot.bsky.social @henninghermes.com @fpeter.bsky.social & @simonwiederhold.bsky.social   Details: tinyurl.com/38hzxdte #EconSky

📢 New deadline for abstract submission! The organizing committee for the International Conference on Social Dilemmas has extended the deadline for abstract submission until *January 29th*. Don't miss out the chance to submit an abstract for talks, short talks & poster sessions! 🤩

📢 4 days left to apply to our PhD position on the effects of inequality on cooperation and competition at Leiden University! 📋 Deadline: 18th December

Out now on Psych Inquiry is my commentary on the interesting claim by Pinsof et al. (2023) that morality does not factor into ideologies. The issue also features great commentaries by @mjbsp.bsky.social , @cmfederico.bsky.social and many others.

🗓️Are you interested in cooperation, social norms, emotions, trust, conflict, and related topics? Then consider submitting an abstract to ICSD! We are really much looking forward to welcoming you in Leiden. Abstract portal is open, see below:

📢 Job alert! Come do your PhD with Angelo Romano (@aromano.bsky.social) and me at Leiden on a cool topic on the effects of inequality on cooperation & competition between groups. 📝Deadline: 18 December Please share widely! www.universiteitleiden.nl/en/vacancies... #AcademiSky #PsychSciSky

New Preprint: Across 51 societies, we find surprising evidence in humans for a tendency to compete more within than between groups, and with closer than distant others. This behavioral tendency can co-exist independently from the tendency to behave parochially: osf.io/preprints/ps...

Participants (N = 3,236 across 17 countries ) who more strongly identified with their nation showed stronger ingroup preferences in a trust game journals.sagepub.com/doi/pdf/10.117…

Before Blue Sky we wrote about group formation and evolution. With Angelo Romano and Jorg Gross, in Perspectives Psychological Science: doi.org/10.1177/1745...