Moral disgust and anger across borders: Linking to forms of aggressive punishment in Western, East Asian, and cross-cultural contexts Anger and disgust are core moral emotions, yet they serve distinct functions in moral punishment. This talk synthesizes findings from a series of studies across Western and 9 East Asian populations, focusing on how these emotions […]
New Article Online: Resource Possession in the Mind’s Eye: Ideological Convergence and Divergence in the Perceptions of Poor People
Resource Possession in the Mind’s Eye: Ideological Convergence and Divergence in the Perceptions of Poor People Wilson N. Merrell†, Lei Fan†, Jennifer Sheehy-Skeffington, Lotte Thomsen Published on Personality and Social Psychology Bulletin †Shared first authorship. Doi: https://doi.org/10.1177/01461672251371787 ABSTRACT Social hierarchies ultimately concern resource possession, yet psychological processes for regulating resource-related tensions remain underexplored. We examine how support for intergroup equality (egalitarianism) relates […]
New Article Online: Linking anger and disgust to motives and anticipations of aggression in the East: testing a socio-functional account of moral emotions in Japan
Linking anger and disgust to motives and anticipations of aggression in the East: testing a socio-functional account of moral emotions in Japan Lei Fan, Catherine Molho, Florian van Leeuwen, Hirotaka Imada, Joshua M. Tybur Published on Cognition and Emotion Doi: https://doi.org/10.1080/02699931.2025.2572709 ABSTRACT Anger and disgust often underlie responses to social transgressions, yet their links to […]
Invited Talk – Guangxi Normal University 广西师范大学
微观人际价值视角下的行为免疫双边互动 Micro-level Interpersonal Motives and the Dual Dynamics of Behavioral Immunity 独秀创新讲坛 Duxiu Innovation Talk Series 经典理论认为,行为免疫系统(BIS)是一套引导接触与社交决策的心理机制,用以降低感染风险。但现实研究对其中一些核心假设提出了挑战,尤其是在群际层面。基于新冠疫情期间的两项纵向追踪和一项跨文化注册研究,我们发现:无论是环境中可感知的疾病威胁,还是外群体线索,这些传统上被视为关键的因素,并未稳定地引发回避或排外。相反,真正的调节机制来自微观的人际价值。人们更愿意为亲密或高价值对象承担风险,而更倾向于回避低价值或不可信对象。纵向数据同样表明,人们对“共享微生物式”风险接触(如近距离、共用品)的舒适度,更取决于对方是谁,而非疫情曲线。重要的是,这种调节不仅存在于健康个体,感染者的行为也会进行镜像的调整:面对高价值关系对象,他们更少隐瞒,甚至更可能主动披露病情。总体而言,感染风险的调控是关系性的、动态的,由避免感染、防止被利用、减少排斥和寻求照料等多种社会动机共同塑造。传染因此是一个双边互动过程:健康个体主要调节回避,感染个体主要调节隐瞒或披露,双方以不同方式权衡社会价值决定行为。这个双主体视角将 BIS 从单纯的病原反应机制重塑为嵌入社会关系的动机系统,并提示需要与生理免疫(PIS)相结合。我们的后续研究以肠–脑通路为切入口,探讨生物状态与社会动机如何共同塑造与疾病相关的行为与互动。 Classic accounts characterize the behavioral immune system (BIS) as a set of psychological processes guiding contact and social decisions to reduce behavioral exposure to pathogens, yet real-world evidence challenges several of its core predictions. Across longitudinal […]
Invited Talk – University of Oslo
Beyond the Ewwwww: Micro-level Interpersonal Motives and the Dual Dynamics of Behavioral Immunity Classic accounts characterize the behavioral immune system (BIS) as a set of psychological processes guiding contact and social decisions to reduce behavioral exposure to pathogens, yet real-world evidence challenges several of its core predictions. Across longitudinal studies during the COVID-19 pandemic and […]
Conference Talk – HBES 2025
Extending Behavioral Immune Trade-Offs: Interpersonal Value in Disease Avoidance and Social Interactions Rooted in Behavioral Immune System (BIS) theory, this research line investigates how interpersonal value shapes social interactions—particularly infection-risky contact, disease concealment, and xenophobia—under high disease salience. Three projects were conducted. The first (three studies, N = 1,694) used U.S. samples to test whether […]
New Article Online: Comfort with microbe-sharing contact across the COVID-19 pandemic: testing behavioral immune system predictions
Comfort with microbe-sharing contact across the COVID-19 pandemic: testing behavioral immune system predictions Hongyu Sun, Lei Fan, Joshua M. Tybur Published on Evolution and Human Behavior Doi: https://doi.org/10.1016/j.evolhumbehav.2025.106710 Abstract Theory within the behavioral immune system literature suggests that pathogen-avoidance adaptations should lead to increased contact avoidance under conditions of increased disease salience. The current study examined this hypothesis by assessing […]
Conference Talk – DPSA 2024
Social class in the mind’s eye: Mental representations, egalitarianism, and discrimination Motivation: Recent declines in explicit bias have, unfortunately, not been accompanied by substantial reductions in group-based inequality. This suggests that implicit biases—relatively unconscious, automatic judgments—may play powerful roles in reinforcing existing social inequalities. The current work examines implicit biases through the lens of social […]
Conference Talk – CBEN 2024
Social class in the mind’s eye: Mental representations, egalitarianism, and discrimination Motivation: Recent declines in explicit bias have, unfortunately, not been accompanied by substantial reductions in group-based inequality. This suggests that implicit biases—relatively unconscious, automatic judgments—may play powerful roles in reinforcing existing social inequalities. The current work examines implicit biases through the lens of social […]
New Article Online:Salience of infectious diseases did not increase xenophobia during the COVID-19 pandemic
Salience of infectious diseases did not increase xenophobia during the COVID-19 pandemic Lei Fan, Joshua M. Tybur, Paul A. M. Van Lange Published on Evolutionary Human Sciences https://doi.org/10.1017/ehs.2024.28 Multiple proposals suggest that xenophobia increases when infectious disease threats are salient. The current longitudinal study tested this hypothesis by examining whether and how anti-immigrant sentiments varied […]