Culture and Ecology Lab (Varnum)
We study a range of topics in this lab, but our main questions have to do with how ecological factors (population density, resource levels, pathogens, seasons, etc) influence human behavior, cultural variation, and cultural change. We are also interested in evolutionary approaches to kin care and sibling dynamics, expert forecasting, quantitative and AI approaches to making inferences about historical data and the mindsets of past populations, the adaptive function of fiction, and even how we might react to discovering the existence of extraterrestrial life.
To address these questions, we use theoretical frameworks and tools from behavioral ecology, evolutionary psychology, econometrics, big data, and cultural psychology.
Sound interesting? The lab is always looking for bright, conscientious undergraduates to work as research assistants. If interested, please contact Michael Varnum or fill out this form
Lab Director and Principal Investigator:
Lab Director and Principle Investigator: Michael Varnum, PhD, Associate Professor, Social Psychology, Department of Psychology
Professor Varnum uses insights from biology to help understand sources of cultural variation and causes of cultural change. Varnum’s interests are broad ranging from the mirror neuron system to reactions to discovery of alien life. Two of his current central research programs are linked to understanding cultural change. In one line of research, he uses frameworks and tools from behavioral ecology, evolutionary psychology, and econometrics to understand the causes of patterns of cultural change and to forecast future patterns of change. In another line of work, he and his collaborators have documented and assessed the accuracy of social scientists’ predictions for future societal trends. You can find his full CV here: Curriculum Vitae.
Graduate Students
Tiffany Chin, Doctoral Student, Social Psychology, Department of Psychology
Chin’s research interests involve applying evolutionary frameworks to understand culture, social cognition, and behavioral change. She is currently investigating stereotypes of immigrants from an affordance management perspective. Tiffany earned her B.A. at the University of California, Irvine.
Lab Alums
Former Graduate Students
Alexandra Wormley – Psychology PhD, 2024, Arizona State University. Post-doctoral Fellow, Department of Psychology, University of Michigan.
Ahra Ko – Psychology PhD, 2023, Arizona State University. Research Project Manager, Behavior Change for Good Initiative, University of Pennsylvania.
Jung Yul Kwon – Psychology PhD, 2022, Arizona State University. Post-Doctoral Fellow, Department of Psychology, The New School for Social Research.
Cari Pick – Psychology PhD, 2021, Arizona State University. Research Scientist, Environmental Defense Fund.
Hannah Bercovici – Geosciences MS, 2020, Arizona State University.
Ryan Hampton – Psychology PhD, 2019, Arizona State University. Research Associate, Wisconsin Department of Health.
Sarah Herrmann – Psychology PhD, 2016, Arizona State University. Associate Professor, Weber State University.
Former Undergraduate Students
Elliot Fluty – Psychology BA, Criminology BS, Suma Cum Laude, 2024. Graduate Student (PhD, Psychology), University of Illinois Urbana-Champaign.
Thaddeus Canuel – Political Science BA, Psychology BA, 2024. Graduate Student (JD), George Washington University.
Remy Olschwang
Mary Florance
Andrea Borokowski
Connor Oloughlin
Victoria Halvorsen
Gabrielle Ambrose, Biomedical Science BS, Summa Cum Laude, Honors, 2022, Arizona State University. Clinical Research Assistant, St. Joseph's Hospital.
Sebastian Santamaria, Psychology BA, Summa Cum Laude, 2021, Arizona State University.
Justyn Zeider, Psychology and Justice Studies BS, Summa Cum Laude, Honors, 2021, Arizona State University. Law student at Arizona State University and Law Clerk at Silva & Fontes.
Meron Mitiku – Chemistry BS, Suma Cum Laude, Honors, 2021. Graduate Student (PharmD), Univiersity of Texas at Austin.
Ruhama Halake – Sociology BS, Suma Cum Laude, 2022. Talent acquisition specialist, Paradox AI.
Krystina Boyd-Frankel, Psychology BS, Honors, 2019, Arizona State University. Graduate Student (Phd, Social Psychology) University of California Irvine.
Caleb Haynes – Psychology BS, 2019, Arizona State University. Research Associate, Temple University.
Wen Yu – Psychology BS, Sociology BS, Summa Cum Laude, 2016, Arizona State University. Graduate Student (MA General Psychology), New York University.
Arianna Beverly – Psychology BS, 2018, Arizona State University.
Sara Russell – Psychology Major, Arizona State University.
Esha Naidu – Psychology BS, Suma Cum Laude, 2017, Arizona State University. Graduate Student (Phd, Social Psychology), SUNY Buffalo.
Ashley Moroney – Psychology BS, Cum Laude, 2017. Arizona State University. Psychology MS, 2021 Cleveland State University.
Brianne Freeman – Psychology BS, 2017 Arizona State University. Graduate Student (PsyD), Nova Southeastern University.
Taylor Brennan – Psychology BS, Magna Cum Laude, 2017, Arizona State University
Jen Jondac – Psychology BS, Cum Laude, Honors, 2017, Arizona State University
Katja Cunningham – Psychology BS, Magna Cum Ladue, 2016, Arizona State University. Graduate Student (PhD, Experimental Psychology [Social]), Texas Christian University
Wen Yu – Psychology BS, Sociology BS, Summa Cum Laude, 2016, Arizona State University.
Shaunting Li – Psychology BS, Biochemistry BS, 2016, Arizona State University.
Michael Della Maggiore – Psychology BA, Magna Cum Laude, 2015, Arizona State University
David Sobota – Psychology BA, Honors, 2015, Arizona State University.
Select Publications
Below are publications from the Culture and Ecology Lab. Graduate student or Post-doc co-authors are noted with #’s. A more complete listing of Dr. Varnum’s publications may be found in his curriculum vitae.
2024/In Press/Accepted
Varnum, M. E. W., Baumard, N., Atari, M., & Gray, K. (accepted for publication). Large language models trained on historical text could serve as an informative tool for behavioral science.The Proceedings of the National Academy of Sciences of the USA.
Varnum, M. E. W., Hutcherson C. A., & Grossmann, I. (accepted for publication). Predicting history: Lessons from the behavioral sciences. The American Historical Review.
Ko, A.,# Neuberg, S. L., Pick, C. M.,# Varnum, M. E. W., & Becker, D. V. (2024). Responses to political partisans are calibrated by a COVID-sensitive disease psychology: A longitudinal investigation. American Psychologist. https://doi.org/10.1037/amp0001318. [advance online publication]
Hohm, I.,# Wormley, A. S.,# Schaller, M., & Varnum, M. E. W. (2024). Homo temporus: Seasonal cycles as a fundamental source of variation in human psychology. Perspectives on Psychological Science, 19, 151-172.
Grossmann, I., Varnum, M. E. W., Hutcherson, C. A., & Mandel, D. R. (2024). When expert predictions fail. Trends in Cognitive Sciences, 28, 113-123.
Kirsch, A. P.,# Kenrick, D.T., Ko, A.,# Pick, C. M.,# & Varnum, M. E. W. (2024). Sibling aggression is surprisingly common and sexually egalitarian. Evolution and Human Behavior, 45, 214-227.
2023
Grossmann, I., Rotella, A.,# Sharpinskyi, K.,# Hutcherson, C. A., Varnum, M. E. W., et al., (2023). Insights into scientists’ accuracy at forecasting societal change. Nature Human Behaviour. https://doi.org/10.1038/s41562-022-01517-1
Wormley, A. S.,# Kwon, J. Y.,# Barlev, M., & Varnum, M. E. W. (2023). How much cultural variation around the globe is explained by ecology? Proceedings of the Royal Society B: Biological Sciences, 290. 20230485.
Hutcherson, C. A., Sharpinsky, K.,# Varnum, M. E. W., Rotella, A.,# Wormley, A. S.,# Tay, L., & Grossmann, I. (2023). On the accuracy, media representation, and public perception of psychological scientists’ judgments of societal change. American Psychologist, 78, 968-981.
Wormley, A. S.,# & Varnum, M. E. W. (2023). How is the behavioral immune system related to hygiene behavior? Current Research in Ecological and Social Psychology, 4, 10081.
Schaerer, M, du Plessis, C., van Aert, R. C. M., Tiokhin, L., Lakens, D., Clemente, E. G., Pfeiffer, T., . . . Gender Audits Forecasting Collaboration, & Uhlmann, E. L. (2023). On the trajectory of discrimination: A meta-analysis and forecasting survey capturing 44 years of field experiments and gender and hiring decisions. Organizational Behavior and Human Decision Processes, 179, 104280.
2022
Wormley, A. S.,# Kwon, J. Y.,# Barlev, M., & Varnum, M. E. W. (2022). The ecology-culture dataset: A new resource for investigating cultural variation. Scientific Data, 9, 615.
Pick, C.,# Ko, A.,# Kenrick, D. T., Wiezel, A.,# Wormley, A. S.,# Awad, E., . . . & Varnum, M. E. W. (2022). Fundamental social motives measured across 42 cultures in two waves. Scientific Data, 9, 499.
Grossmann, I., Twardus, O.,# Varnum, M. E. W., Jayawickreme, E., & McLevey, J. (2022). Expert predictions of societal change: Insights from the world after COVID project. American Psychologist, 77, 276-290.
Pick, C.,# Ko, A.,# Wormley, A. S.,# Wiezel, A.,# Kenrick, D. T., Al-Shawaf, L., . . . & Varnum, M. E. W. (2022). Family still matters: Human social motivation across 42 countries during a global pandemic. Evolution and Human Behavior, 43, 527-535.
Wilbanks, D.,# Moon, J. W.,# Stewart, B.,# Gray, K., & Varnum, M. E. W. (2022). Not just a hijack: Imaginary worlds can enhance individual and group level fitness. Behavioral and Brain Sciences, 45, E305.
Herrmann, S. D., Varnum, M. E. W., Straka, B. C., & Gaither, S. E. (2022). Social class identity integration and success for first-generation college students: Antecedents, mechanisms, and generalizability. Self & Identity, 21, 553-587.
2021
Varnum, M. E. W., & Grossmann, I. (2021). The psychology of cultural change: Introduction to the special issue. American Psychologist, 76, 833-837.
Rotella, A.,# Varnum, M. E. W., Sng, O., & Grossmann, I. (2021). Increasing population densities predict decreasing fertility rates over time: A 174-nation investigation. American Psychologist, 76, 933-946.
Krems, J. A., Ko, A.,# Moon, J. W.,# & Varnum, M. E. W. (2021). Lay beliefs about gender and sexual behavior: First evidence for a pervasive, persistent (but seemingly unfounded) stereotype. Psychological Science, 32, 871-889.
Hampton, R. S.,# Kwon, J. Y.,# & Varnum, M. E. W. (2021). Variations in the regulation of affective neural responses across three cultures. Emotion, 21, 283-296.
Kwon, J. Y.,# Wormley, A. S.,# & Varnum, M. E. W. (2021). Changing cultures, changing brains: A framework for integrating cultural neuroscience and cultural change research. Biological Psychology, 162, 108087.
Sevincer, A. T., Kwon, J. Y.,# Varnum, M. E. W., & Kitayama, S. (2021). Risky business: Cosmopolitan cities and risk-taking. Journal of Cross-Cultural Psychology, 52, 295-315.
Varnum, M. E. W., Krems, J. A.,# Morris, C., Wormley, A. S.,# & Grossmann, I. (2021). Why are song lyrics becoming simpler? A time series analysis of lyrical complexity in six decades of American popular music. PLOS ONE, 16, e0244576.
Bunker, C. J.,# & Varnum, M. E. W. (2021). How strong is the association between social media use and false consensus effects. Computers in Human Behavior, 125, 106947.
Kwon, J. Y.,# Glenberg, A. M., & Varnum, M. E. W. (2021). Culture, ecology, and grounded procedures. Behavioral and Brain Sciences, 44, e13.
Varnum, M. E. W., & Hampton, R. S.# (2021). Cultural changes in neural structure and function. In J. Y. Chiao, S.-C. Lee, R. Turner, S. Y. Lee-Tauler, & B. Pringle (Eds.), Oxford Handbook of Cultural Neuroscience and Global Mental Health (pp. 387-408). Oxford, UK: Oxford University Press.
2020
Ko, A.,# Pick, C.,# Kwon, J. Y.,# Barlev, M.,# Krems, J. A., Varnum, M. E. W., . . . & Kenrick, D. T. (2020). Family matters: Rethinking the psychology of human social motivation. Perspectives on Psychological Science, 15, 173-201.
Na, J., Grossmann, I., Varnum, M. E. W., Karasawa, S., Cho, Y.,# Kitayama, S., & Nisbett, R. E. (2020). Culture and personality revisited: Behavioral profiles and within-person stability in interdependent/independent social orientation and holistic/analytic cognitive style. Journal of Personality, 5, 908-924.
Fraser, A. M.,# Hampton, R. S.,# Spinard, T. L., Varnum, M. E. W.,Blais, C., Eisenberg, N., Gal, D.,# Berger, B. H.,# Xu, J.,# & Xiao, X.#(2020). Children’s mu-suppression is sensitive to witnessing others’ social victimization. Social Neuroscience, 15, 348-358.
Hampton, R. S.,# & Varnum, M. E. W. (2020). Individualism-collectivism. In V. Zeigler-Hill & T. Shackelford (Eds.), Encyclopedia of Personality and Individual Differences (pp. 2231-2238). Cham, Switzerland: Springer.
2019
Varnum, M. E. W., & Grossmann, I. (2019). The wealth -> life history -> innovation account of the industrial revolution is largely inconsistent with empirical time series data. Behavioral and Brain Sciences, 42, e212.
Varnum, M. E. W. (2019). Social norms are becoming weaker. Nature Human Behaviour, 3, 211.
Santos, H. C.,# Grossmann, I., & Varnum, M. E. W. (2019). Culture, cognition, and cultural change in social in class. In W. H. Berkhaus, & G. Ignatow (Eds.), The Oxford Handbook of Cognitive Sociology (pp 271-284). Oxford, UK: Oxford University Press.
Sevincer, A. T., Varnum, M. E. W., & Kitayama, S. (2019). The land of opportunity: Cosmopolitan cities attract independent immigrants. In N. Kakabadse & N. Mouraviev (Eds.), Entrepreneurship and Global Cities: Diversity, Opportunity and Cosmopolitanism (pp. 27-47). New York, NY: Routledge.
Kitayama, S., Varnum, M. E. W., Salvador, C.# (2019). Cultural neuroscience. In D. Cohen & S. Kitayama (Eds.), Handbook of Cultural Psychology, 2nd Edition (pp. 79-118). New York, NY: The Guilford Press.
2018
Sng, O., # Neuberg, S. L., Varnum, M. E. W., Kenrick, D. T. (2018). The behavioral ecology of cultural psychological variation. Psychological Review, 125, 714-745.
Hampton, R. S., # & Varnum, M. E. W. (2018). Do cultures vary in self-enhancement? ERP, behavioral, and self-report evidence. Social Neuroscience, 13, 566-578.
Hampton, R. S., # & Varnum, M. E. W. (2018). The cultural neuroscience of emotion regulation. Culture and Brain, 6, 130-150.
Herrmann, S. D., # & Varnum, M. E. W. (2018). The consequences of social class biculturalism for well-being, academic performance, and workplace adjustment. Journal of Cross-Cultural Psychology, 49, 635-663.
Kwon, J. Y., # Bercovici, H., # Cunningham, K., # & Varnum, M. E. W. (2018). How will we react to the discovery of extraterrestrial life? Frontiers in Psychology, 8, 2308. doi.org/10.3389/fpsyg.2017.02308
Herrmann, S. D., # & Varnum, M. E. W. (2018). Utilizing social class bicultural identity integration to improve outcomes for first-generation college students. Translational Issues in Psychological Science, 4, 165-175.
2017
Varnum, M. E. W., & Grossmann, I. (2017). Cultural change: The how, and the why. Perspectives on Psychological Science, 12, 956-972.
Santos, H. C., # Varnum, M. E. W., Grossmann, I. (2017). Global increases in individualism. Psychological Science, 28, 1228-1239.
Sng, O.,# Neuberg, S. L., Varnum, M. E. W., & Kenrick, D. T. (2017). The crowded life is a slow life: Population densities and human life history strategies. Journal of Personality and Social Psychology, 111, 736-754.
Varnum, M. E. W., & Grossmann, I. (2017). Socio-ecological changes are linked to changes in the prevalence of contempt over time. Behavioral and Brain Sciences, 40, e250. [commentary]
Varnum, M. E. W.,& Kitayama, S. (2017). The neuroscience of social class. Current Opinion in Psychology, 18, 147-151.
Krems, J. A.,# & Varnum, M. E. W. (2017). More than just climate: Income inequality and sex ratio are better predictors of cultural variations in aggression. Behavioral and Brain Sciences, 40, e89. [commentary]
Grossmann, I., & Varnum, M. E. W.(2017). Divergent life histories and other ecological adaptations: Examples of social class differences in attention, cognition, and attunement to others. Behavioral and Brain Sciences, 40, e327. [commentary]
Varnum, M. E. W., & Hampton, R. S.# (2017). Culture and self-other overlap in neural circuits. In N. Gonzales, E. Telzer, & J. M. Causadias (Eds.), Handbook of Culture and Biology 9pp. 443-464). New York, NY: Wiley.
Kwon, J. Y.,# Hampton, R. S.,# & Varnum, M. E. W.(2017). The cultural neuroscience of socioeconomic status. In A. Ibanez, L. Sedeno, & A. Garcia (Eds.), Neuroscience and Social Science: The Missing Link (pp. 383-395). Springer.
Varnum, M. E. W.,& Hampton, R. S.# (2017). Cultures differ in the ability to enhance affective neural responses. Social Neuroscience, 12, 594-603.
Sevincer, A. T., Varnum, M. E. W., & Kitayama, S. (2017). The culture of cities: Measuring perceived cosmopolitanism. Journal of Cross-Cultural Psychology, 48, 1052- 1072.
2016
Varnum, M. E. W., & Grossmann, I. (2016). Pathogen prevalence is associated with cultural changes in gender equality. Nature Human Behaviour, 1, 0003.
Varnum, M. E. W.(2016). The emerging (social) neuroscience of SES. Social and Personality Psychology Compass, 10, 423-430.
Varnum, M. E. W., Blais, C., & Brewer, G. A. (2016). Social class affects Mu-suppression during action observation. Social Neuroscience, 11, 449-454.
Cohen, A. B., & Varnum, M. E. W. (2016). Beyond east vs. west: Social class, region, and religion as forms of culture. Current Opinion in Psychology, 8, 5-9.
Varnum, M. E. W., & Kwon, J. Y. # (2016). The ecology of withdrawal. Commentary: The NEET and Hikikomori spectrum: Assessing the risks and consequences of becoming culturally marginalized. Frontiers in Psychology, 7, 764. doi: 10.3389/fpsyg.2016.00764.
2015
Varnum, M. E. W., Blais, C., Hampton, R. S., # & Brewer, G. A. (2015). Social class affects neural empathic responses. Culture and Brain, 3, 122-130.
Grossmann, I., & Varnum, M. E. W. (2015). Social structure, infectious diseases, disasters, secularism, and cultural change in America. Psychological Science, 26, 311-324.
Sevincer, A. T., Kitayama, S., & Varnum, M. E. W. (2015). Cosmopolitan cities: The frontier in the 21st century? Frontiers in Psychology, 6, 1459. doi: 10.3389/fpsyg.2015.01459
Varnum, M. E. W. (2015). Higher in status, (even) better-than-average. Frontiers in Psychology, 6, 496. doi: 10.3389/fpsyg.2015.00496.
2014
Varnum, M. E. W., Shi, Z., Chen, A., Qiu, J., & Han, S. (2014). When “your” reward is the same as “my” reward: Self-construal priming shifts neural responses to own vs. friends’ rewards. NeuroImage, 87, 164-169.
Jiang, C., Varnum, M. E. W., Hou, Y., & Han, S. (2014). Distinct effects of self-construal priming on empathic neural responses in Chinese and Westerners. Social Neuroscience, 9, 130-139.
Varnum, M. E. W. (2014). Sources of regional variation in social capital in the United States: Frontiers and pathogens. Evolutionary Behavioral Sciences, 8, 77-85.
Smith, G. E., James, L. E., Varnum, M. E. W., & Oyserman, D. (2014). Give up or get going? Productive uncertainty in uncertain times. Self and Identity, 13, 681-700.
Kitayama, S., Varnum, M. E. W., & Sevincer, A. T. (2014). The frontier: Voluntary settlement and cultural change. In A. Cohen (Ed.), Culture Reexamined: Broadening Our Understanding of Social and Evolutionary Influences (pp. 93-127). Washington, DC: APA.
2013
Han, S., Northoff, G., Vogeley, K., Wexler, B. E., Kitayama, S., & Varnum, M. E. W. (2013). A cultural neuroscience approach to the biosocial nature of the human brain. Annual Review of Psychology, 64, 335-359.
Grossmann, I., Na, J., Varnum, M. E. W., Kitayama, S., & Nisbett, R. E. (2013). A route to well-being: Intelligence vs. wise reasoning. Journal of Experimental Psychology: General, 142, 944-953.
Varnum, M. E. W. (2013). Frontiers, germs, and non-conformist voting. Journal of Cross- Cultural Psychology, 44, 832-837.
Varnum, M. E. W. (2013). What are lay theories of social class? PLOS ONE, 8, e70589. doi:109371/journal.pone.0070589.
In the News and More!
Dr. Varnum speaks about the impact of seasons on human behavior on NPR’s Science Friday (2024).
Dr. Varnum and Ian Hohm wrote an article for the Washington Post: "How winter affects our mood, thinking and sex drive" (2023)
Alexandra Wormley won an NSF Graduate Research Fellowship! (2021)
Dr. Varnum published a piece in Foreign Policy highlighting why "Everyone Was Wrong on the Pandemic’s Societal Impact" (2021)
Dr. Varnum receives NSF RAPID grant to study COVID's social-psychological effects (2021)
Dr. Varnum received SPSP Theoretical Innovation Award with Dr. Neuberg, Dr. Kenrick, and Dr. Sng (2020)
Contact Us
Dr. Varnum is considering applications for graduate student positions for fall 2025. Potential graduate students interested in working with Dr. Varnum as primary advisor should apply to ASU's PhD program in psychology, specializing in social psychology by December 5, 2024. For more information about the program and steps to apply, please visit https://psychology.asu.edu/degrees/specializations/social-psychology.