Paul Smaldino

@bthalpin Glad you’re enjoying it! And yeah, that’s a fair point.

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Jonathan Carroll

@bthalpin I found this example to be very interesting and wanted to see if I could golf it down a little with Distances.jl - I think it came out quite clean.

gist.github.com/jonocarroll/81

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Paul Smaldino

@bthalpin I love this. It is a long-term goal to translate all the models from the book into Julia (and other languages, but Julia is top priority). As you surmised, I chose NetLogo for practical reasons, but I think that serious modelers should be competent in more general languages.

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Brendan Halpin

I've been looking at @psmaldino's book on social simulation press.princeton.edu/books/pape for a potential new course.

I like it a lot but it uses NetLogo. I'd prefer to use Julia, so I spent a couple of hours this afternoon translating his first example.

Result: likely quite straightforward to teach from this book using Julia. Blog summary:

brendanhalpin.net/blog/posts/n

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Paul Smaldino boosted
Smudge The Insult Cat 🐀
fuck-customers The next person who tries to correct me when I say "Happy Holidays" is going to be told Happy Hanukkah instead. Very tired of hearing, "No, it's MERRY CHRISTMAS." I'm pretty sure Judaism was around a lot longer than your Buckstar's boycotting butt, Karen. batzendrick My boss once shared a great story about that. This happened when he was in a layover in North Carolina back when the "War on Christmas" bullshit was first becoming prominent. He had gone to get a pack of cigarettes, and after he paid for it: "Merry Christmas." "Happy holidays." "No. I said Merry Christmas." "Do you know what Hanukkah is about?" "No, what?" "Some people tried to make us worship their ways, so we rose up and killed them. Happy Hanukkah."
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Dan Gillmor

As warned, Reddit has taken a bundle of money from "Open"AI and will use it to further monetize what you -- and the volunteers who moderate it all -- contributed for free.

It's the norm now, and particularly slimy in this case.

theverge.com/2024/5/16/2415852

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Paul Smaldino

Evolution of Similarity-Biased Social Learning.

New preprint with Alejandro Perez Velilla. A long time in the making. Feedback welcome!
osf.io/preprints/socarxiv/j7ya

Humans often learn preferentially from ingroup members who share a social identity affiliation, while ignoring or rejecting information when it comes from someone perceived to be from an outgroup. This sort of bias has well-known negative consequences---exacerbating cultural divides, polarization, and conflict---while reducing the information available to learners. Why does it persist? Using evolutionary simulations, we demonstrate that similarity-biased social learning (also called parochial social learning) is adaptive when (1) individual learning is error-prone and (2) sufficient diversity inhibits the efficacy of social learning that ignores identity signals, as long as (3) those signals are sufficiently reliable indicators of adaptive behavior. We further show that our results are robust to considerations of other social learning strategies, focusing on conformist and payoff-biased transmission. We conclude by discussing the consequences of our analyses for understanding diversity in the modern world.
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Paul Smaldino

Evolution of Similarity-Biased Social Learning.

New preprint with Alejandro Perez Velilla. A long time in the making. Feedback welcome!
osf.io/preprints/socarxiv/j7ya

Humans often learn preferentially from ingroup members who share a social identity affiliation, while ignoring or rejecting information when it comes from someone perceived to be from an outgroup. This sort of bias has well-known negative consequences---exacerbating cultural divides, polarization, and conflict---while reducing the information available to learners. Why does it persist? Using evolutionary simulations, we demonstrate that similarity-biased social learning (also called parochial social learning) is adaptive when (1) individual learning is error-prone and (2) sufficient diversity inhibits the efficacy of social learning that ignores identity signals, as long as (3) those signals are sufficiently reliable indicators of adaptive behavior. We further show that our results are robust to considerations of other social learning strategies, focusing on conformist and payoff-biased transmission. We conclude by discussing the consequences of our analyses for understanding diversity in the modern world.
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Paul Smaldino

Lovely review of my book from Mirta Galesic/SFI

santafe.edu/news-center/news/n

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Paul Smaldino

Interdisciplinary Workshop on Identity and Politics at IAST/Toulouse, May 15-16. Looking forward to this.

iast.fr/interdisciplinary-work

The Institute for Advanced Study in Toulouse (IAST) will be hosting an Interdisciplinary Workshop on Identity and Politics. This workshop is organized by the IAST Research Team on Leadership, Power, and Inequality (LPI). May 15-16, 2024
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Paul Smaldino

Interdisciplinary Workshop on Identity and Politics at IAST/Toulouse, May 15-16. Looking forward to this.

iast.fr/interdisciplinary-work

The Institute for Advanced Study in Toulouse (IAST) will be hosting an Interdisciplinary Workshop on Identity and Politics. This workshop is organized by the IAST Research Team on Leadership, Power, and Inequality (LPI). May 15-16, 2024
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Paul Smaldino

Re: recent SCOTUS decision on Trump's immunity, most folks are (prob correctly) focused on it as a delay strategy, assuming they will ultimately uphold the lower court's decision. 🤞 If they don't, seems like a clear signal that right-wing coalitions are committed to going all-in on authoritarianism.

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Paul Smaldino

@ct_bergstrom The harmonies are excellent. Kudos.

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Robotistry

@futurebird @stveje
NOT looking for suggestions.

Bemoaning the fact that on the iPad

1. You can't search for "no in-app purchases, pay up front, no ads, do not collect personal data" apps

2. There is no way to find the good apps without wading through a morass of terrible apps

3. Developer payment options are primarily: gather user's data and sell it; charge rent; ads / protection racket

Almost no apps operate on a "pay me to own the thing as is" basis.

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Paul Smaldino

New draft of a modeling paper I really love, by me and Zack Dunivin. "Dynamics of covert signaling: Modeling the emergence and extinction of identity signals."

Methods! We got coupled differential equations, agent-based modeling, random forest classifiers.
osf.io/preprints/psyarxiv/3tz2

Results. See abstract.
Results. See abstract.
Abstract Covert identity signals permit the communication of group membership to ingroup members while avoiding potentially costly detection by members of other groups. If individuals are incentivized to detect others' group memberships, however, covert signals may not remain covert for very long. We propose a theoretical extension to the literature on covert signaling in which conventionalized identity signals can become destabilized when learned by outgroup individuals, to be replaced by the emergence of new signaling conventions. We formalize this idea with both analytical and agent-based modeling of ingroup and outgroup individuals who to learn about signals of group membership. Depending on the risk and associated cost of detection by the outgroup, the model yields three dynamic classes: saturation, where all identity signals become stable conventions and never go extinct; cycling, in which new signals emerge to replace old ones as they are learned by the outgroup; and suppression, in which informative identity signals never emerge. Our analysis has implications for understanding identity signaling, the emergence of conventions, coded speech, and the ebb and flow of fashion cycles.
Model diagram
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Paul Smaldino boosted
Brian C. Keegan, Ph.D.

“Grandpa, if everyone knew what was causing climate change and how to stop it, why didn’t you?”

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Paul Smaldino

I really enjoyed this conversation on the Converging Dialogues podcast talking about Modeling Social Behavior, models, theory, and the future of social science. convergingdialogues.substack.c

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Paul Smaldino

@lakens this is one of the main ideas I associate with Popper — it’s all over his book Objective Knowledge IIRC

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Steven Strogatz

The third edition of my textbook, Nonlinear Dynamics and Chaos, was published today. You can preview the first 68 pages on Google Books, or take a look at the preface below to see what's new. The main new thing is a chapter on the Kuramoto model! Hope you enjoy it.

Page one of the preface
Cover
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Paul Smaldino

@abbynormative @sabrinaschalz@fediscience.org @academicchatter I'm pretty overloaded right now, but if they're really in a pinch I could be persuaded. More appropriate though might be more solidly "animal behavior" folks like @Eliz_Hobson @damienfarine Albert Kao, Jeff Schank, Hanna Kokko, Kevin Ringelman

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