FACULTY
Coralie Chevallier (Group Leader)
I am a behavioural scientist studying the evolutionary and cognitive determinants of social cognition. I have mainly focused on the way motivational factors affect people’s social cognition. More recently I have worked on the way stress, environmental harshness, and uncertainty impact a range of social and non-social decisions:
- prosociality and social trust
- political attitudes and religion
- health attitudes, fertility and parenting
The central hypothesis behind my work is that environmental and motivational factors alter individuals’ minds in significant ways and should be targeted upstream to improve people’s lives.
Hugo Mercier (Group Leader)
I am an evolutionary and cognitive psychologist working on the function and workings of reasoning. With Dan Sperber, we have developed the argumentative theory of reasoning, which offers a new function for human reasoning: to find and evaluate arguments so as to convince others and only be convinced when it is appropriate. I also study the cognitive mechanisms with which people evaluate communicated information.
I was trained as a theoretician in evolutionary biology, and I’m interested in understanding behavior, in particular human behavior, based on an evolutionary perspective. My work focuses on two major questions:
(1) Why is human cooperation universally constrained by the logic of fairness? To answer this question, I develop models in collaboration with Nicolas Baumard and Stéphane Debove. We show that, whereas pairwise reciprocity per se is undertermined (what economists call the folk theorem), the evolution of reciprocal cooperation becomes constrained by fairness principles when individuals can freely engage in a diverse range of social interactions, and choose among them.
(2) Why is reciprocal cooperation so rare among non humans but so frequent in humans? To answer this question, with the help of models, I show that reciprocal cooperation is not a regular form of adaptation that can evolve by natural selection. Rather its evolution, like the evolution of communication, requires the recycling of functions evolved intially for a different purpose. I’m interested in showing how this constraint explains both the rarity of reciprocal cooperation among non-humans, and the form that it takes in humans.
I am interested in using evolutionary and psychological approaches in the social sciences, in particular in economics.
More specifically, I use:
- Biological market theory to explain why moral judgments and cooperative behaviors are based on considerations of fairness;
- Life-history theory to explain behavioral variability across culture, history, social classes and developmental stages;
- Dual process theory to explain the content of human reflections and religious thinking (in particular on morality and gods);
- all of the above to explain why some public policies naturally work better
I am currently working on human social cognition, more precisely on the developmental puzzle about false-belief attribution in human childhood. Most preschoolers have been reliably shown to fail verbal false-belief tasks, but growing evidence based on non-verbal tests has also shown that preverbal infants expect an agent to act in accordance with the content of her (true or false) belief. I take the infant data at face value as evidence of false-belief attribution in human infancy and I propose a pragmatic explanation of the failure of most preschoolers on verbal false-belief tasks.
I study cultural transmission from a perspective that combines quantitative cultural history with cognitive science and cultural evolution. In How Traditions Live and Die (2016), I described how cultural transmission can be mediated by psychological mechanisms that are unrelated to fidelity but sensitive to content. That book outlined a research programme calling for the testing of cognitive science hypotheses with data from quantitative cultural history. I have carried out this research programme in several areas, publishing articles on historical changes in the legibility of written letters, on the dissemination of heraldic designs, and on the long-term transmission of children's games, among other subjects. The central question running through all these studies is: How can human traditions be appealing enough to be transmitted across generations without losing their distinctive features? One of the key forces in cultural preservation is the development of graphic records: visual symbols that encode information, allowing transmission to continue even when it skips several generations. My recent work therefore focuses on graphic communication. We study the evolution of visual symbols, from writing systems and pictograms to online multiplayer games. In the future, I hope to address fundamental questions about the nature of writing and why it emerged only when and where it did.
Daniel Nettle
I am a behavioural scientist with training in both psychology and anthropology. My work spans the biological, cognitive and social sciences. My current research projects are in one or more of the following areas:
- the impacts of poverty and inequality
- trust, cooperation and antisocial behaviour
- moral and political cognition
- adversity and aging
- hunger and food insecurity
I am also interested more broadly in explanations in the behavioural sciences; in interdisciplinary synthesis; and in open science. Where possible I argue for the application of what we can learn from research to public policy.
My personal web site is www.danielnettle.org.uk
ASSOCIATE FACULTY
Dan Sperber is a French social and cognitive scientist, formerly at the CNRS, currently at the Central European University. He has developed a naturalistic approach to culture, “cultural attraction theory.” With Deirdre Wilson, he has developed a cognitive approach to communication, "relevance theory". With Hugo Mercier, he has developed an evolutionary “interactionist” approach to human reason. He has also worked on social ontology, cognitive modularity, morality, epistemic vigilance, and cultural symbolism.
Lou Safra
I am interested in the cognitive mechanisms underlying social and political behaviour, notably leader choice and cooperation. In particular, I adopt an ecological and evolutionary approach to better understand the inter-individual differences in these domains, across both space and time. To do so, I rely on behavioral data, social surveys, computational modeling and, more recently, cultural artifacts such as paintings and books.
TEACHERS AT PSL UNIVERSITY
Valentin Thouzeau
I teach at undergraduate level, introducing students to carrying out a complete interdisciplinary scientific research project in quantitative human and social sciences: problematization, data collection, data manipulation, graphical representation, statistical modelling and communication. In parallel with my teaching, I carry out research at the intersection between the study of human psychology, biological evolution and fiction. In particular, I seek to understand the origins of our attraction to works of fiction using a variety of methods.
POST DOCS
Arnaud Wolff
In my current research, I study the empirical reality of desperation thresholds (whether people experience threshold-like situations) and investigate the factors underlying desperation thresholds, mainly by conducting interviews with people from marginalized communities. Originally trained as an economist, I took a strategic and evolutionary perspective in my dissertation to study the persuasive function of positive illusions, the signaling value of social identity, social preferences as well as self- and social-signaling. More generally, I am particularly interested in understanding how human psychology adapts to the physical and social environment.
Julia Buzan
My research investigates how contexts of poverty and inequality shape decision-making. Specifically I explore how seemingly irrational behaviour may reflect a rational recalibration to socioeconomic constraints. My current research seeks to empirically test decision-making around ‘desperation thresholds’, minimum resource levels below which it can be costly and potentially damaging to fall. More broadly, I am interested in understanding how social support from institutions affects behavior and well-being, and in applying the tools of psychological science to inform the design and evaluation of social programs and policy.
Edgar Dubourg
I take an interdisciplinary evolutionary approach to the psychological foundations of fictions. I am interested in the ecological, cognitive, and behavioral drivers of the cultural evolution of fictions, focusing on how cognitive adaptations and adaptive plasticity impact both the universality and the variability of cultural preferences. More particularly, my research investigates the links between the biological evolution of exploratory preferences and the cultural evolution of innovative cultural productions, such as imaginary worlds.
PHD STUDENTS
Ruoting Liu
I am interested in human cooperation, especially in two distinct preferences: parochial and universal cooperation. My PhD project investigates the evolution of cooperation and cooperation preferences in Chinese history using evidence from diverse cultural artifacts. Furthermore, my research explores which ecological affordances are associated with these trends, contributing to our understanding of when, where, and why people’s cooperation and preferences vary across historical contexts.
Zoé Zhong Ying
I studied communication and media, working with qualitative and quantitative methods on cultural phenomenons. My primary fields of interests now lie in cultural evolution and cognitive science. In particular, my research topic is cognitive and computational approaches to the cultural evolution of ancient and modern Chinese functions. I am also interested in Fiction,Pop culture and related stuff.
Mona Joly
PhD candidate at the WZB Berlin Social Science Center and the Freie Universität in Berlin, I try to understand the growing social gradient in health behaviours from an evolutionary behavioural perspective. I seek to identify the environmental cues that drive individuals’ perceived control over their mortality risk, and how they adapt their health investment accordingly. Moreover, I’m interested in the public policy applications of behavioural science research, especially in the domain of health.
Olha Guley
My research combines evolutionary psychology, philosophy (epistemology and ethics), and learning sciences (design of educational interventions) to study non-experts' beliefs and theories about the brain and neuroscience in the domains of healthcare, policymaking, education, and research. I seek to understand why people resist neuroscience explanations in some domains while preferring them in others and what interventions can help change people's attitudes toward the brain. Ultimately, my project seeks to reduce misconceptions about the brain (such as the belief that there are "male" and "female" brains, that the brain does not change over time, and that brain-based disorders cannot be cured) among educators, healthcare professionals and the general public.
Zhaolun Fan
I possess training in both psychology and sociology, and I employ quantitative and computational methods in the field of social and cultural psychology. My primary focus centers on understanding cultural variations and their impact on society and behavior. I investigate a range of topics, including the global and regional variations in individualism and collectivism, cultural variation in different social strata, and the behavioral outcomes arising from these cultural disparities. To scrutinize the causal relationship between culture and behavior, I leverage quantitative and computational techniques, guided by theoretical perspectives rooted in evolutionary psychology.
Noemon Baudoin
I am interested in all topics related to information-seeking, and to the evaluation and transmission of information. During my thesis, I am studying the impact our social environment can have on curiosity. My first aim is to develop a theory of curiosity that takes into account the existence of multiple agents who can learn from one another. I will then develop online experiments and simulations to test the predictions made by this theory.
Alexey Koshevoy
I am particularly interested in how language is optimized for communication and learning. By applying methods from cultural evolution, corpus linguistics and computational modelling, I am trying to uncover the sources of one of the “hallmarks” of efficiency -- linguistic ambiguity. Moreover, I am also interested in how general cognitive biases shape the semantic and pragmatic features of natural languages.
Justine Avenel
As an expert in health behaviour change, I am interested in how cognitive sciences and public health can be combined to make preventive communication more effective, particularly for smokers from disadvantaged socio-economic backgrounds.
Grégory Fiorio
The aim of my PhD project is to investigate the psychological underpinnings of moral judgments regulating the use of violence in armed conflicts. To do this, I will use the methodological and theoretical tools of moral psychology and evolutionary anthropology. My goal is to elucidate the conditions and criteria that underlie the perception of the use of violence as morally (un)acceptable, both for the belligerents and for uninvolved third parties. Ultimately, I aim to map the content of these moral intuitions, identify the cognitive processes underlying them, and predict the cultural variation of norms governing armed conflicts.
Thomas Beuchot
During my PhD, I study why and how people change. My work focuses on two main questions.
First, which factors shape people’s personality traits over time? I examine how ecological factors (such as socio-economic status and exposure to adversity) and biological factors (such as health, physical characteristics and genetics) jointly contribute to who we become.
Second, how can we use these individual differences to design more effective, evidence-based charitable initiatives and public policies? Here, I investigate how ecological and psychological factors influence behaviour in response to different kinds of interventions.
More broadly, I aim to understand the conditions that foster socially desirable traits such as openness, altruism and wellbeing
Marius Mercier
In my PhD, I investigate how people form and update impressions—especially judgments about others’ competence—when given new (and often noisy) information. I’m fascinated by the interplay between intuitive first impressions and subsequent behavioral or verbal input. Do these updates follow optimal Bayesian rules, or do initial impressions tip the scales?
Website : https://mariusmercier.github.io/.
Grégoire Darcy
I am a cognitive social scientist with a multidisciplinary background in psychology, law, economics, and public policy. My research primarily focuses on the role of interpersonal trust in society, examining how it develops and its impact on normative ecosystems. I am particularly interested in how trust influences the cognitive processes that drive moral judgments and shapes preferences regarding norms, institutions, and public policies. In addition, I conduct theoretical and experimental research at the intersection of psychology, law, and political science. For example, my current work explores moral intuitions related to intellectual property, as well as the legal tools used in administrative law to regulate behavioral measures. I also teach in Classes Préparatoires aux Grandes Écoles (DE & D2) and at the École de Guerre, covering subjects such as general culture, economic and social issues, cognitive sciences, and the psychology of counter-propaganda.
VISITING MEMBERS
MASTER STUDENTS
Hossein Samani - M2 Student, 2024-2025
Janne Yrjö-Koskinen - M2 Student, 2024-2025
ALUMNI
Amine Sijilmassi - PhD Student
Laudine Carbuccia - PhD Student
Jan Pfänder - PhD Student
Antoine Marie - PhD Student
Fiona Tho Pesch - Post Doc
Lou Safra -
Charles de Dampierre - PhD Student 2021-2024
Mathilde Mus - PhD Student 2021-2024
Mélusine Boon Falleur - PhD Student 2019-2024
Aurore Grandin - PhD Student 2020-2024
Mia Karabegović - Post-doc 2021-2024
Aurore Grandin - PhD Student 2021-2024
Léo Fitouchi - PhD Student 2020-2023
Julien Lie - PhD Student 2020-2023
Léonard Guillou - PhD Student 2019-2022
Rita Abdel Sater - PhD Student 2019-2022
Mauricio Martins - Post-doc 2019-2021
Paul Ecoffet - PhD Student 2018-2021
Sacha Altay - PhD Student 2018-2021
Niels Lettinga - PhD student 2018-2021
Pierre Jacquet - Post-doc 2017-2021
Félix Geoffroy - PhD Student, 2015-2018
Hugo Mell - PhD Student, 2015-2018
Christina Ioannou - PhD Student, 2014-2017
Stéphane Lambert - PhD Student 2013-2016
Mark Sheskin- Post-doc 2013-2015, now post doc at Yale University
Stéphane Debove- PhD Student 2012-2015
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