I am a social psychologist studying the historical and cultural roots of the societal challenges that define the 21st century.
One line of research examines the cultural evolution of conceptions of the natural environment, and what consequences these conceptions have for how individuals and societies address modern ecological crises, such as climate change.
A second line of research examines interpersonal social cognition from a social ecology perspective to understand how children shape adult social cognition and behaviour, and what consequences the presence (or absence) of children may have for well-being, meaning, and social connection.
My research is inherently interdisciplinary, and I test theory-driven questions with a mixed-methods approach that combines the experimental and psychometric methods foundational to social and personality psychology with cross-cultural surveys, field studies, 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.
Cultural Evolution of Ecological Concepts
How do evolving conceptualizations of nature dictate how individuals and societies confront environmental issues?
Interpersonal 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]