RESEARCH

Overview

We study social behavior, focusing not just on how people act, but why. Many of our current projects examine how ecological conditions (such as pathogen prevalence, resource availability, and population density) fundamentally shape the way people connect with others, drawing on social, evolutionary, and ecological perspectives. We use a variety of methods in our research, including lab experiments, online surveys, field studies, analyses of social network datasets, and simulations with large language model agents.

Current questions include:

  • How does living in regions with higher disease risk shape people’s everyday social ties and activities?
  • How does feeling like resources are scarce, or could change suddenly, affect the choices people make?
  • How does living in crowded versus spread-out neighborhoods shape the way people see themselves and treat others?
  • Can social behavior under ecological threat be modeled using large language model-based agents?

Explore the publications below to learn more about our work.

under review

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    Multi-decade pathogen threat and social ties: Strengthening bonds, weakening bridges
    S. Choi, O. Jeong, Y. Cha, and N. R. Buttrick
    under review

2026

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    Infectious disease concerns predict narrow friendship networks
    S. Choi and J. M. Ackerman
    Evolution & Human Behavior, 2026

2025

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    I see sick people: Beliefs about sensory detection of infectious disease are largely consistent across cultures
    J. M. Ackerman, T. Samore, D. M. T. Fessler, T. R. Kupfer, S. Choi, and 2 more authors
    Brain, Behavior, and Immunity, 2025
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    Infected Smallville: How disease threat shapes sociality in LLM agents
    S. Choi, K. Lee, O. Sng, and J. M. Ackerman
    In International Conference on Machine Learning (ICML) MAS Workshop, 2025

2024

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    When and why people conceal infectious disease
    W. M. Merrell, S. Choi, and J. M. Ackerman
    Psychological Science, 2024

2023

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    Safety first, but for whom? Shifts in risk perception for self and others following COVID-19 vaccination
    S. Choi, W. N. Merrell, and J. M. Ackerman
    Social and Personality Psychology Compass, 2023

2022

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    Keep your distance: Different roles for knowledge and affect in predicting social distancing behavior
    S. Choi, W. N. Merrell, and J. M. Ackerman
    Journal of Health Psychology, 2022

2020

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    What people believe about detecting infectious disease using the senses
    J. M. Ackerman, W. N. Merrell, and S. Choi
    Current Research in Ecological and Social Psychology, 2020
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    Situational experience around the world: A replication and extension in 62 countries
    D. I. Lee, G. Gardiner, E. Baranski, International Situations Project Members, and D. C. Funder
    Journal of Personality, 2020

2018

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    Retrospective time travel in life satisfaction judgment: A life history approach
    S. Choi and E. M. Suh
    Personality and Individual Differences, 2018
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    Predictors of subjective well-being across cultures
    E. M. Suh and S. Choi
    In Handbook of Subjective Well-being, 2018