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Reposted by Diego Guevara Beltran

Paul Smaldino @psmaldino.bsky.social · 7d

Happy to see this work published in Psych Review. It's an impressive and important bit of theory/modeling about how we learn about decision-making under risk. Here's a slide with the super-coarse-grained summary of our results. Read the paper for (much) more. osf.io/preprints/so...

Modeling the evolution of peer and vertical/oblique learning strategies for gambles under uncertainty
We recover many empirical results and generate new hypotheses:
Worse conditions lead to more pessimistic behavior
Younger people are overly optimistic
Wealthy people can afford to take more risks
Payoff-biased learning for the rich, parochialism for the poor
Poor people may be slower to adapt to environmental change, creating the appearance of “poverty traps”

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Raihan Alam @raihanalam.bsky.social · Aug 19

I'm so jazzed to finally have this paper out with
@tagerai.bsky.social in @pnas.org! It's probably my favorite paper I've worked on so far. What happens when punishment is incentivized? 🧵
t.co/y5DUUGTdT9

https://www.pnas.org/doi/10.1073/pnas.2508479122

t.co

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Catherine Molho @cmolho.bsky.social · Aug 18

📣 New registered report in @nathumbehav.nature.com with Ivan Soraperra, @jonathanschulz.bsky.social, and Shaul Shalvi: rdcu.be/eAcMA

With data from 7,978 participants in 20 countries, we find that information about negative externalities promotes prosociality, especially in guilt-prone individuals.

Guilt drives prosociality across 20 countries

Nature Human Behaviour - This Registered Report of 7,978 people in 20 countries found that guilt and information about consequences drive prosocial behaviour. Guilt-prone individuals gave more when...

rdcu.be

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mark brandt @mjbsp.bsky.social · Aug 18

In a study of naturally occurring ostracism experiences: After experiencing ostracism, people initially prioritize withdrawal and prosocial coping responses. Prosocial responses increase overtime. Anti-social responses were relatively rare

journals.sagepub.com/doi/pdf/10.1...

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Diego Guevara Beltran @psycheddiego.bsky.social · Aug 16

Could be, I don’t know, it’s an interesting hypothesis, but that kind of conflates zero-sum thinking with other-regarding motivations— one doesn’t logically follow from the other

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Diego Guevara Beltran @psycheddiego.bsky.social · Aug 16

That’s a quantitative issue. Zero-sum thinking likely isn’t binary, it likely exists on a continuum and we’re more likely to see it when it fits our interests, and undermine it when it doesn’t

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Felix Baier @felixbaier.bsky.social · Jul 23

🚨Very happy that my PhD work is now out in @nature.com!

We discovered that evolution, by acting in the midbrain, shifted the threshold to escape in Peromyscus mice, to fine-tune defensive strategies in different environments

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

This was a truly collaborative effort! 🧵⬇️

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Vivek V. Venkataraman @vivek123.bsky.social · Jul 27

Some fun unpublished data from a talk I gave years ago on the sexual division of labor (SDOL) among the Batek of Malaysia.

The Batek have been described as highly gender-egalitarian.

Kirk and Karen Endicott collected the data in 1975-76, back when the Batek were fully nomadic foragers.

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Diego Guevara Beltran @psycheddiego.bsky.social · Jul 15

A preprint of this work can be found here: osf.io/preprints/ps... (10/10).

OSF

osf.io

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Diego Guevara Beltran @psycheddiego.bsky.social · Jul 15

In follow-up work, we will examine sources of interdependence, shared fate, and cooperation (1) among dyads to study bidirectional (i.e., partner) effects, (2) whether shared fate guides partner-choice decisions, and (3) consequences for social integration & wellbeing (9/10).

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Diego Guevara Beltran @psycheddiego.bsky.social · Jul 15

Combined, results support the hypothesis that shared fate provides a proximate solution to partner choice dilemmas: Help partners to the extent that one has a positive stake in their welfare (8/10).

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Diego Guevara Beltran @psycheddiego.bsky.social · Jul 15

Finally, we show in a follow-up study with a subset of participants (N = 36, Obs. = 108) that shared fate is associated with helping more often in the past two weeks, and actual helping behavior (i.e., forgoing money to purchase a pound of rice for targets) (7/10).

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Diego Guevara Beltran @psycheddiego.bsky.social · Jul 15

We also find that shared fate statistically mediated all associations between relatedness and helping, suggesting shared fate is a key mechanism by which relatedness structures cooperation in this community (6/10).

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Diego Guevara Beltran @psycheddiego.bsky.social · Jul 15

However, at the within-person level, relatedness, sharing food (i.e., eating together), and shared subsistence activities (i.e., planting/harvesting, hunting/fishing) emerged as the most diagnostic cues of positive shared fate, and shared fate was associated with helping (5/10).

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Diego Guevara Beltran @psycheddiego.bsky.social · Jul 15

In bivariate correlations, we find that 8/10 sources of interdependence were correlated with higher shared fate, and shared fate correlated with more helping across 7 fitness-relevant domains (e.g., helping target's children, sharing crops) (4/10).

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Diego Guevara Beltran @psycheddiego.bsky.social · Jul 15

We wanted to test the idea that shared fate (e.g., "what is good for [target] is good for me") is a summary estimate of the degree to which people share a positive stake with others, and shared fate proximally guides helping towards positively interdependent partners (3/10).

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Diego Guevara Beltran @psycheddiego.bsky.social · Jul 15

We interviewed people (N = 146, Obs. = 437) about their sources of interdependence (e.g., relatedness, shared subsistence activities, commensality, co-residence, co-religiosity), shared fate, and helping towards an acquaintance, cousin, and a sibling (2/10).

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Diego Guevara Beltran @psycheddiego.bsky.social · Jul 15

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).

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The Onion @theonion.com · Jul 12

New Evidence Suggests Humans May Have Been Dipping Crunchy Things Into Gooey Things Earlier Than Previously Thought theonion.com/new-evi...

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John Sakaluk @johnsakaluk.bsky.social · Jul 10

🧵
Very excited (w/ @omarjcamanto.bsky.social) to share our preprint tutorial for using our R 📦 dySEM for #dyadic data analysis with latent variables, in cross-sectional data sets.

This paper has been literal years in the making, and provides three distinct tutorials.

osf.io/preprints/ps...

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Angelo Romano @aromano.bsky.social · Jul 9

🚨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/...

Reciprocity evolves more readily in competitive than cooperative socio-ecologies | Proceedings of the Royal Society B: Biological Sciences

Tracking what others did and matching other’s expected actions is seen across a range of biological systems. As reciprocal matching rewards and reinforces cooperators and punishes and discourages non-...

royalsocietypublishing.org

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Diego Guevara Beltran @psycheddiego.bsky.social · Jul 6

Added!

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Nature Human Behaviour @nathumbehav.nature.com · Jul 3

Psychology & geography need one another to fulfil their mandates, but integrating them has been empirically challenging. A new perspective by Götz et al proposes a unifying Geographical–Psychological Interactionist Framework to inspire concrete & testable hypotheses.
www.nature.com/articles/s41...

A unified framework integrating psychology and geography - Nature Human Behaviour

In this Perspective, Götz et al. propose the unifying Geographical–Psychological Interactionist Framework, which aims to integrate psychology and geography to account for the context in which human be...

www.nature.com

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David P. Schmitt, Ph.D. @psychoschmitt.bsky.social · Jun 26

"grandmother hypothesis holds that senior women's foraging and food sharing led to life history changes that favored mate guarding, not paternal provisioning, in the formation of nuclear family-like social units" doi.org/10.1002/evan...

Targeting the Hunting Hypothesis: Review of Evidence From the Hadza

The hunting hypothesis holds that ancestral human males favored their own mates and children in sharing meat gained from big game hunting, a practice said to have led to the origin of nuclear familie....

doi.org

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Diego Guevara Beltran @psycheddiego.bsky.social · Apr 1

Added!

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