How developing prosocial motivations shape children’s altruism Developmental perspectives are crucial to harnessing the human potential for altruism. We synthesise and highlight recent research on the motivations underlying children’s (costly) prosocial behaviour. The order in which children develop intrinsic, extrinsic, and strategic motivations to benefit others has implications for efforts to positively impact young people’s lives.

Online Now: How developing prosocial motivations shape children’s altruism

There is a fully-funded PhD position at the Max Planck Institute for Evolutionary Anthropology to pursue dissertation research among the Mayangna of Nicaragua, expanding a longitudinal study of subsistence strategies and behavioral ecology. Please share the posting!
www.eva.mpg.de/career/posit...

😂😂😂

Combined, we suggest that relational interdependence allows people to respond sensitively to a partner’s rewarding and aversive events despite interference that may come from self-directed challenging (i.e., incongruent) information, in turn facilitating relationship functioning

What's more, women's for their partner's positive feedback was associated with their own + their partner's positive relationship outcomes : )

In line with preregistered hypotheses, we find that participants reporting higher relational interdependence experienced stronger affect in line with their partner's feedback -- even when receiving self-directed challenging (i.e., incongruent) information!

We measured couple's relational interdependence over a week-long daily diary. Then, in a novel social feedback task (CLOSE Task), participants reported their affect following self- and partner-directed feedback of social rejection and acceptance

How do people respond to a partner’s positive and negative outcomes when faced with challenging information? We (Shanshan Ma Erin Maresh Andrea Coppola @mehlmr.bsky.social Jessica Andrews-Hanna &
@dsbarra.bsky.social) tackle this in new work at Affective Science: link.springer.com/article/10.1...

Whom Should We Help? People Track Shared Fate to Solve Cooperation Dilemmas - HBES – by Diego Guevara Beltran English Imagine you live in a small community where food is often scarce; storms, droughts, pests, and fires can destroy crops, disease and injuries can keep you from workin...

and is also featured in the EHB blog, in both English and Spanish! www.hbes.com/whom-should-...

@jessicadayers.bsky.social @jeremykoster.bsky.social @athenaaktipis.bsky.social + Daniel Balliet, Lee Cronk

Our work investigating how sources of fitness interdependence are associated with shared fate (summary estimate of interdependence) and guide cooperation in a small-scale subsistence society is available at EHB (see thread for summary) www.sciencedirect.com/science/article/pii/S1090513825001515

How do people know whom, and how much, to help? we (@jessicadayers.bsky.social @leecronk.bsky.social Daniel Balliet @jeremykoster.bsky.social & @athenaaktipis.bsky.social) tackle this question among the Mayangna of northern Nicaragua, who rely primarily on horticulture for subsistence 🧵(1/10).

Application still open! Are you interested in interdependence and cooperation, understanding the psychology of people living in subsistence communities, cross-cultural generalizability + variation? This might be the right place for you!

Updated application portal is now live! arizona.csod.com/samldefault....

The SPECIEs Lab (Psychology department - UArizona) is looking for a postdoctoral fellow to join the team (please share)!

Start date: Summer-Fall 2026
Review: until filled
Duration: 3-years
Materials: 1-2 page cover letter, CV, 2-3 reference contacts
Send materials to: dguevarabeltran@arizona.edu

I’m happy to announce that our paper "The Meanings and Dividends of Man the Hunter" has now been published in Evolution and Human Behavior.

www.sciencedirect.com/science/arti...

Calibrated deference: Children's evaluations of responses to disagreement across knowledge gaps Declaring that you are right or wrong is not merely a factual matter, but often a deeply social decision about when to own up to the limits of your kn…

New paper with Ben Morris and Alex Shaw out last week in @cognitionjournal.bsky.social! We find that children are sensitive to who has better evidence when evaluating how people behave in disagreements.

www.sciencedirect.com/science/arti...

1/3

New study just out! 🚨 We created a way to rewind and fast forward through cultural differences in China.
www.nature.com/articles/s41... @natureportfolio.nature.com

Many mammals will also eat the placenta, so for many it is womb food

Interdependence strongly guides partner choice, giving help, and getting help from people in your network #EPatSPSP2026 @spspnews.bsky.social

@psycheddiego.bsky.social talks to us about cooperation and interdependence in the Mayangna

I don’t read that as a criticism of deriving hypothesis from an evolutionary perspective per se but more as a criticism of a) over-reliance on self-reports over behavior; b) lack of diverse perspectives among those making predictions

Do Great Apes Know Each Other's Names? Probing Great Ape Comprehension of Social Vocal Labels — Animal Behavior and Cognition

New article out exploring great ape name recognition! We find partial evidence that zoo-living chimps & bonobos know each other's names 👀 Huge thanks to Animal Behavior and Cognition (a great open-access journal) & co-authors for your collaboration!🎉🐵

unsvr1.com/web/abc/work...

How do people decide whom to help when cooperation is costly and resources are limited?

Kinship and reciprocity are not the full story—research by @psycheddiego.bsky.social et al suggests shared fate (the other person’s outcomes influences one’s own) complements:

buff.ly/fRinBjR

Introducing PowerLMM.js!

A new tool for power analysis of longitudinal linear mixed-effects models (LMMs) – with support for missing data, plus non-inferiority and equivalence tests.

powerlmmjs.rpsychologist.com

Would really appreciate your feedback as I refine this app! Details below 🧵👇

As we head toward #SAS2026 we are excited to partner with @inclivio.com to support EMA research in affective science.
If you’re attending the conference, like (1 entry) and repost (3 entries) this post to enter a drawing for 1 of 3 licenses to run your study on Inclivio for *free*.
inclivio.com

Updated application portal is now live! arizona.csod.com/samldefault....

Our partnership with the @inclivio.com continues as we get closer to #SAS2026.
Inclivio provides EMA researchers with tools that make data collection easier and more participant friendly.
Like (1 pt) and repost (3 pts) to enter a drawing for free access to Inclivio!
inclivio.com

In our new American Psychologist paper, we debunk the decades old zombie idea that evolutionary psychology is unfalsifiable.

🧵

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)