This is an *excellent* video on iodine. I had learned about some of these stories from @ruben.the100.ci, but I wasn't quite aware of how much of a public health miracle iodized salt is. www.youtube.com/watch?v=XRcw...

The easiest way to make the world smarter

YouTube video by Rabbit Hole

youtube.com

#OTD 1857 John Snow shows again the thinking that made him one of the founders of epidemiology. In a letter to the Lancet, he suggests that the routine adulteration of bread with alum might be a cause of rickets, a mechanistic hypothesis to explain it, then a case-control design to test it. 1/5🧵

A new study provides causal evidence from 9 countries where they experimentally manipulated intergroup polarization: When polarization decreases people discriminate less, while support for democratic principles increases & willingness to engage in compromise grows phys.org/news/2026-06...

Har bidratt med kapittelet "Høyreekstrem ideologi – sentrale strømninger i dagens Norge" sammen med @jacravn.bsky.social i boken "Høyreekstremisme i Norge etter 22. juli", redigert av @arjupskas.bsky.social @crexuio.bsky.social

1. Høyreekstrem ideologi – sentrale strømninger i dagens Norge

scup.com

@newsweek.com report on our comparative study of the impact of affective polarization

Scientists found a way to ease political hostility—then came the US result

The researcher told Newsweek that "partisan animosity in the U.S. may simply be too far gone."

newsweek.com

Out in POQ -- Mind the Gap: Partisan Bias in Justifying Political Violence in the United States academic.oup.com/poq/article/...

Mind the Gap: Partisan Bias in Justifying Political Violence in the United States

Abstract. Political polarization in America has intensified beyond mere disagreement to what scholars characterize as sectarianism—a condition where partis

academic.oup.com

Lars Erik Berntzen@leberntzen.bsky.social · 8mo ago

Do Americans judge acts of partisan political violence impartially? No. We show that Democrats and Republicans exhibit clear partisan bias: both see the same violent act as more justified when it targets the other party than when it targets their own side. osf.io/preprints/so... #polisky

New interactive blog! "Why Adjusted Regression Coefficients Are Less Descriptive Than They Look" rpsychologist.com/descriptive-...

The most unrealistic assumption in social science is that respondents read survey questions the way researchers do

Faculty are forever making fun of students for asking questions that are answered on the syllabus but if you’ve ever been to a faculty meeting you know that faculty constantly ask questions that are answered by the program handbook or departmental bylaws. Constantly (me included).

NOW OUT ON FIRSTVIEW!! Citizen–Elite #Toxicity & #Political #Equality Online By @janabelschner.bsky.social & Linn Sandberg doi.org/10.1017/S153...

I år er det 15 år siden 22. juli-terrorangrepet. I den anledning har vi skrevet bok om høyreekstremisme i Norge etter 22. juli. Boka oppsummerer 10 år med forkning ved @crexuio.bsky.social og er åpent tilgjengelig for alle her: www.scup.com/doi/book/10....

Scandinavian University Press

scup.com

Yet again www.nber.org/papers/w3535...

How many Iranians support the Islamic Republic? In a new working paper, we answer this using a nationally representative survey of 2,000 adults in Iran—and the list experiment, a method for measuring sensitive attitudes.

If you work on public opinion and/or political behaviour you might want to consider submitting your abstract(s) to JCPOP 2026 in Barcelona - All the info 👇

Barcelona Network of Political Science (BANPS)@bcnpolisci.bsky.social · 2mo ago

🎉🎉 8th BANPS-JCPOP ANNUAL MEETING 2026! 🎉🎉 🚨CALL FOR PAPERS! Submit your abstract 👉 tuit.cat/690ps 🏁You have time until 3 July, 2026 📅 19 November, 2026 📍UOC More information on our website 👉 www.banps.cat/jcpop

Out in POQ -- Mind the Gap: Partisan Bias in Justifying Political Violence in the United States academic.oup.com/poq/article/...

Mind the Gap: Partisan Bias in Justifying Political Violence in the United States

Abstract. Political polarization in America has intensified beyond mere disagreement to what scholars characterize as sectarianism—a condition where partis

academic.oup.com

Lars Erik Berntzen@leberntzen.bsky.social · 8mo ago

Do Americans judge acts of partisan political violence impartially? No. We show that Democrats and Republicans exhibit clear partisan bias: both see the same violent act as more justified when it targets the other party than when it targets their own side. osf.io/preprints/so... #polisky

In June, Switzerland will vote on what is so far the most radical far-right popular initiative launched by the Swiss People‘s Party SVP: capping the population at 10M (currently ≈9.1M). In this thread, I’ll break down what it’s about and how it fits into broader findings on Swiss direct democracy

Taking a stand ✋️🧍 These authors 🧵 use survey data across 9 countries to assess the downstreams consequences of #AffectivePolarization & intervene to successfully reduce participants #AffectivePolarization in 6 of the 9, improving interpersonal relations and social norms buff.ly/tHRWa65

The (alleged) consequences of affective polarization: A survey experiment in nine democracies | European Journal of Political Research | Cambridge Core

The (alleged) consequences of affective polarization: A survey experiment in nine democracies

cambridge.org

Does affective polarization itself actually threaten democracy? Recent experiments from the US suggest maybe not. In our new @ejprjournal.bsky.social paper, we revisit this question comparatively with a survey experiment in 9 democracies (18,000 respondents). #polisky

1/ Happy to share that "Factorial Difference-in-Differences" (FDID), with Anqi Zhao and @pengding00 , is out in JASA - ACS. doi.org/10.1080/0162... It has been a truly thrilling experience working with Anqi and Peng.

Factorial Difference-in-Differences

We formulate factorial difference-in-differences (FDID), a research design that extends canonical difference-in-differences (DID) to settings in which an event affects all units. In many panel data...

doi.org

Frustrating that AI has sullied the em-dash. It's just so versatile! I haven't been able to come up with a good replacement, so am going to reclaim it despite the risks its use now carries.

#OpenAccess from @ejprjournal.bsky.social - The (alleged) consequences of affective polarization: A survey experiment in nine democracies - https://cup.org/43vEJV0 - @eelcoharteveld.bsky.social, @leberntzen.bsky.social, @andrejkokkonen.bsky.social, @hayleekelsall.bsky.social, et al #FirstView

🌟 New article 👥 Eelco Harteveld, Lars Erik Berntzen, Andrej Kokkonen, Haylee Kelsall, Jonas Linde & Stefan Dahlberg 👉 The (alleged) consequences of affective polarization: A survey experiment in nine democracies 📗 European Journal of Political Research 🔗 www.cambridge.org/core/journal...

LLM-sycophancy is a major concern across a whole range of domains. But as ⬇️ points out, worth thinking about what a meaningful control group is here

Berna Devezer@devezer.bsky.social · 2mo ago

re: sycophancy of llms. most people don't seek out a random sample of strangers to ask for advice regarding their personal conflicts, no? we don't actively solicit negative feedback on our relationships. we tend to look for empathy, understanding, affirmation, validation regardless of whether

Does affective polarization itself actually threaten democracy? Recent experiments from the US suggest maybe not. In our new @ejprjournal.bsky.social paper, we revisit this question comparatively with a survey experiment in 9 democracies (18,000 respondents). #polisky

As I have been arguing for almost a decade, populism is a secondary feature for most populist actors. Moreover, the main current threat to liberal democracy comes from the far right, which at least in Europe and U.S., is primarily nativist. In fact, some are barely populist anymore.

What can we learn from automating an entire quantitative social science paper, from prompt to finished product? Thread about ongoing work with @natewilmers.bsky.social 1/12 Paper: osf.io/preprints/so...

In the interest of not thinking about the Virginia Supreme Court decision, I wrote a blog post. The Schizophrenogenic Mother: Behavior Genetics' Origin Story Misses the Point open.substack.com/pub/ericturk...

The Schizophrenogenic Mother

Behavior Genetics' Origin Story Misses the Point

open.substack.com

Are you interested in conjoint experiments? Wrote about my new R package *cjdiag* on my website. Feedback welcome! dkarpa.github.io/blog/2026/be...

1/ We've been measuring intellectual humility wrong. Most scales ask "are you intellectually humble?" but the people least humble are the most miscalibrated about it. They overclaim. The #humilityparadox. Out today in Behavior Research Methods. Here's what we did instead. 🧵