I am a social psychologist interested in how human groups navigate complex societal challenges.Â
Much of my work has focused on uncovering the cognitive and cultural mechanisms underlying environmental decision-making. In this work, I take a cultural evolution perspective to ask how conceptions of nature change over historical time (e.g., instrumental-spiritual, concrete-abstract) and how these conceptions shape the management of natural resources. By taking a cultural psychology approach to nature-environment relationships, we can gain insight into how cognition and culture determine the sustainability of societies.
The methods I most often use are behavioural experiments, cross-cultural surveys, and natural language processing.
At present, I am a postdoc in the Department of Psychology at the University of California, Irvine. I received my PhD in Social and Personality Psychology at the University of British Columbia, Canada supervised by Ara Norenzayan and Mark Schaller.
Ecological Cognition
How do evolving conceptualizations of nature dictate how individuals and societies confront environmental issues?
Social Cognition
How does motivation and emotion govern our perception, judgment, and connection with others?
Introduction to ecospirituality, moralization of nature, and environmental decision-making.
Billet, M. I., Baimel, A., Schaller, M., & Norenzayan, A. (2025) Ecospirituality. Current Directions in Psychological Science, 34(2), 97-104. https://doi.org/10.1177/09637214241304326 [pdf]
How functional perspectives of social cognition help us understand the perception of children.
Billet, M. I., Hohm, I., Dunn, R. M., Hofer, M. K., Sidloski, B., & Schaller, M. (2026). What do people want to know about another person? The answer differs depending on whether that person is an adult or a child. PLOS One, 21(2), e0342425. https://doi.org/10.1371/journal.pone.0342425 [pdf]
Apocalyptic narratives predict support for extreme political action.
Billet, M. I., White, C. J. M., Shariff, A., & Norenzayan, A. (in press). End of world beliefs are common, diverse, and predict how people perceive and respond to global risks. Journal of Personality and Social Psychology. Advance online publication. https://doi.org/10.1037/pspi0000519 [pdf]