Simon Columbus

@simoncolumbus.bsky.social

Lecturer, University of St Andrews | I work on cooperation, norms, institutions, & personality | http://simoncolumbus.com

Fascinating that people continue to defend Arday, incl Zach Polanski. Arday has already corrected two papers, including one where he removed or altered quotes from supposed participants which had word-for-word overlap with another paper. How's that for plagiarism? retractionwatch.com/2026/07/27/c...

Exclusive: News outlet killed story on plagiarism allegations after Cambridge prof hired law firm

Jason Arday In September 2025, Times Higher Education had a bombshell story in the works: A star sociology professor at the University of Cambridge had allegedly plagiarized parts of his Ph.D. thes…

retractionwatch.com

Dear editors: sending me manuscripts missing basic information is the best way to make me think twice about reviewing for your journal. Second time in as many months that I have to return a manuscript because I simply cannot figure out the design of the experiment.

Whether or not radicalization is a good replacement, the political science concept of polarization is normatively dubious, descriptively thin and causally... eh, let's not even go there. I know you just got a big grant to study it but I'm sure they'll let you spend the money on something more useful

Petter Törnberg@pettertornberg.com · 4w ago

‘Polarization’ has become the master concept for diagnosing our current democratic crisis. But this is not polarization. It is the radicalization of the political right. By misdiagnosing it, we risk becoming complicit in the crisis. 🧵 Just out in Perspectives on Politics doi.org/10.1017/S153...

I think a big problem has been a kind of confused circular logic where people (especially researchers, but not political scientists) go “Things seem bad and polarized. What is polarization? It’s a bimodal opinion distribution. Anything that produces a bimodal opinion distribution is bad!”

This looks like a paper every personality psychologist should have an opinion on. I've often defended broad factor models to cognitive scientists and economists who look at them askance because they are genuinely useful, but it's hard to argue that personality traits are common causes as modelled.

Michael P. Grosz@mp-grosz.bsky.social · 4mo ago

I'm excited to share that my paper "Why the Big Five Personality Traits Are Composites, Not Common Causes" has just been accepted at Psychological Review. The preprint is available on PsyArXiv: osf.io/preprints/ps...

A table illustrating the benefits of adopting a composite-formative model and of focusing on narrower personality traits

Hey all! Been away from BSky for a while but this Friday I am giving a talk on our latest PNAS Nexus paper on repeated games! We model situations where players, instead of acting simultaneously, act in order. We study the status of well-known equilibrium strategies when simultaneity is broken.

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academic.oup.com

Simon Columbus@simoncolumbus.bsky.social · 4mo ago

This week's Cooperation Colloquium: Saptarshi Pal (Harvard) From simultaneous to leader-follower play in direct reciprocity Date: April 10 Time: 15:00 UTC+2 (Vienna) / 9am ET (NYC) Sign up here: list.ku.dk/postorius/li...

Abstract: Repeated interaction is a key mechanism driving the evolution of cooperation, generosity, extortion, and other social behaviors. These behaviors are typically studied using two-player repeated games, where the two players act simultaneously in every round. In this paper, we begin with a standard two-action repeated game, but transform it into a leader–follower game. We do this by forcing one player to indicate their impending move, or to openly commit first in each round. We show that this simple transformation provides new and useful analytical insights. In particular, we use this transformation to derive expressions for the main classes of simultaneous-move Nash equilibria of memory-1, when payoffs are discounted. We show that these equilibria also remain stable under the leader–follower structure. We prove that this reassuring property does not always extend to games with more than two actions or to equilibrium strategies with longer memory. Overall, we establish a novel connection between repeated simultaneous-move games and repeated leader–follower games in evolutionary game theory. This approach offers fruitful means of investigating how prediction and anticipation play a role in stable social behavior.

Do you want to do a PhD in Judgment and Decision Making in two beautiful European locations on human-AI interaction? Well have I got news for you. @bahniks.bsky.social and I are recruiting a candidate to start around September 2026. See here: decisionlab.vse.cz/english/we-a...

We are hiring

PhD Position in Judgment & Decision Making At a Glance Topic: Human-AI Interaction & Cognitive Biases Locations: VŠE Prague (2 years) + Maastricht University (2 years) Funding: Fully funded (4-year pr...

decisionlab.vse.cz

Scientific Reports is just Frontiers for people who think their work should've been published in Nature. In my experience, their editors frequently have no clue about the research they are handling and their communication is shoddy. I no longer review for them.

Daniel Heck@danielheck.bsky.social · 4mo ago

I always had the vague feeling that Scientific Reports and Nature Communications are mainly APC business models. A paper estimated the total APC for gold/hybrid Open Access per journal 2015–2018: doi.org/10.1162/qss_... Surprise, surprise - there are 2 outliers at the top😐