I am a chancellor's fellow (~=lecturer; US equivalent: ~=assistant professor) in psychology at the University of Edinburgh. Before that, I was a postdoc with Chris Lucas and Neil Bramley (also at Edinburgh). I did my PhD at UCSB's Center for Evolutionary Psychology, working with Leda Cosmides and John Tooby

Broadly speaking, my research is motivated by the following question: what are the basic building blocks of thought? How do they structure the way we spontaneously think and feel about the world?

Recently I have developed simple theories of the intuitive concepts of causation and intentional action. According to the first theory, people tend to think "C caused E" to the extent that events E and C are correlated across counterfactual worlds. According to the second theory, people think that an agent did X intentionally if her attitude toward X caused X. I have been arguing that both theories have a very close fit to the empirical data about how people use these concepts.

I also work on social cognition, using a combination of experiments, evolutionary game theory, and agent-based simulations.

I can be reached at tadeg.quillien AT gmail.com

Selected Publications (see full list here)


Quillien, T., Tooby, J., & Cosmides, L. (2023). Rational inferences about social valuation. Cognition. [SI][code & data][thread]. 

Quillien, T., & Lucas, C. (2023). Counterfactuals and the logic of causal selection. Psychological Review. [code & data][thread]

Quillien, T. (2023). Rational information search in welfare-tradeoff cognition. Cognition. [code & data][thread]

Quillien, T., & Lucas, C. (2022). The logic of guesses: how people communicate probabilistic information. Proceedings of the Cognitive Science Society. [code & data][thread]

Quillien, T., & German, T. (2021). A simple definition of 'intentionally'. Cognition [code & data][SI][thread]

Quillien, T. (2020). When do we think that X caused Y?. Cognition [code] [SI][blog][media]

Quillien. T. (2020). Evolution of conditional and unconditional commitment. Journal of Theoretical Biology [code][data][SI][media coverage][thread]

Quillien. T. (2019). Universal modesty in signal-burying games. Proceedings of the Royal Society B [code][data][media coverage]

Quillien, T. (2018). Psychological essentialism from first principles. Evolution & Human Behavior