The Emotion That Protects Us—and Divides Us
Disgust is a basic emotion that evolved primarily as a disease avoidance mechanism—what researchers often call the behavioral immune system. Its earliest form, distaste, protected humans from ingesting toxins, but over time disgust expanded into a complex emotional system triggered not only by sensory cues but also by cognitive appraisals and social judgments. Found across cultures, disgust functions as a powerful bodily rejection response that helps maintain health by steering people away from contaminants such as rotting food, bodily fluids, and decaying animals (Jones, 2007; Penn, 1997). Although Darwin noted the universality of disgust, modern scientific study is largely credited to Paul Rozin, whose foundational work at the University of Pennsylvania earned him the nickname “Dr. Disgust.” As Rozin observed, “almost all disgusting food is of animal origin,” highlighting how closely disgust is tied to evolutionary concerns about contamination and disease.
Researchers typically identify three major domains of disgust (Olatunji et al., 2008). Pathogen or core disgust involves the rejection of substances that pose infection risk—such as feces, vomit, blood, or rotting flesh—with feces approaching a near universal disgust response (Rozin & Fallon, 1987). Sexual disgust reflects avoidance of sexual partners or behaviors perceived as unhealthy or reproductively risky; this domain is closely linked to cultural purity norms, religious laws, and moral judgments surrounding sexuality. Studies by Haidt and colleagues show that sexual disgust contributes to the moral foundation of purity and can even shape attitudes toward marginalized groups, including LGBTQ individuals (Sutton, 2016; Sutton et al., 2019). Finally, moral disgust arises in response to social violations such as cheating, exploitation, or cruelty. Far from being a mere metaphor, moral disgust produces measurable physiological and facial responses, as shown in research documenting disgust reactions to verbal, visual, and social presentations of moral transgressions (Chapman & Anderson, 2013). Together, these domains illustrate how disgust operates not only as a biological defense but also as a social and moral emotion that shapes cultural norms, interpersonal judgments, and group cohesion.
Author: Geoffrey W. Sutton, PhD
Cite this post (APA)
Sutton, G. W. (2024, August 5). Psychology of disgust: The emotion that protects us--and divides us. Psychology Concepts and Theories. https://suttonpsychology.blogspot.com/2024/08/psychology-of-disgust.htmlDisgust in the Six Dimensions of the SCOPES Model
The Psychological Core: CEO
C: Cognition — How Disgust Shapes Thinking
Cognitively, disgust arises from appraisals that something is offensive, contaminating, or impure. The mind evaluates a stimulus not only by its current state but also by its history—its origins, associations, or perceived moral meaning. These appraisals can extend beyond physical contaminants to include “impure thoughts” or morally troubling ideas. Once something is labeled as disgusting, it becomes difficult to reinterpret, creating strong psychological distance and reinforcing avoidance.
E: Emotion — The Affective Experience of Disgust
Emotionally, disgust is characterized by a powerful feeling of revulsion, rejection, or contamination. It is a negatively valenced state designed to push the individual away from potential harm. People may experience a visceral “yuck” sensation, accompanied by guilt or shame when disgust is directed inward or tied to moral concerns. This emotional force helps protect the individual from physical toxins but also shapes moral and social judgments.
O: Observable Behavior — How Disgust Is Expressed
Behaviorally, disgust leads to withdrawal, avoidance, and distancing from the offending object, person, or idea. It is associated with a universal facial expression—wrinkled nose, raised upper lip—that signals rejection to others. People may physically recoil, cover their mouth or nose, or refuse to touch objects associated with contamination. These behaviors serve both self protection and social communication functions.
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Internal and External Contexts
P: Physical / Biological Context — The Body’s Response to Disgust
Physiologically, disgust produces distinctive bodily reactions, including nausea, reduced heart rate, and sensations of queasiness. Unlike fear, which increases arousal, disgust often slows the body down, preparing it to expel or avoid contaminants. The anterior insula plays a central role in processing disgust, integrating sensory information with emotional and bodily responses. These biological mechanisms reflect disgust’s evolutionary role in disease avoidance.
S: Social Context — Disgust in Culture and Community
Socially, disgust is a powerful tool for enforcing cultural norms, purity rules, and moral boundaries. Communities use disgust to mark behaviors as taboo, regulate hygiene practices, and maintain social order. Disgust also contributes to stigma and exclusion, as groups or individuals may be labeled “contaminating” or “impure.” Religious purity codes and moral traditions often reflect this social function, linking disgust to ideas of sin, sacredness, and moral cleanliness.
Our Psychological Core
S: Self — Disgust and Self Concept
At the level of self, disgust can turn inward, producing self disgust—feelings that one’s own body, thoughts, or actions are contaminated or morally wrong. This can lead to shame, self isolation, and a damaged sense of identity. Spiritual or religious frameworks may intensify these experiences when individuals view themselves as falling short of moral or purity standards. Over time, self directed disgust can shape self esteem, moral self evaluation, and the way individuals understand their place within their community.
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References
Haidt, J. (2012). The righteous mind: Why good people are divided by politics and religion. Pantheon.
Jones, D. (2007). The depths of disgust. Nature 447, 768–771. https://doi.org/10.1038/447768a
Lenk, M., Ritschel, G., Abele, M., Roever, P., Schellong, J., Joraschky, P., Weidner, K., & Croy, I. (2019). The source effect as a natural function of disgust in interpersonal context and its impairment in mental disorders. Scientific reports, 9(1), 4239. https://doi.org/10.1038/s41598-019-40802-4
Olatunji, B. O., Ebesutani, C., Haidt, J., & Sawchuk, C. N. (2014). Specificity of disgust domains in the prediction of contamination anxiety and avoidance: a multimodal examination. Behavior therapy, 45(4), 469–481. https://doi.org/10.1016/j.beth.2014.02.006
Olatunji, B. O., Haidt, J., McKay, D., & David, B. (2008). Core, animal reminder, and contamination disgust: Three kinds of disgust with distinct personality, behavioral, physiological, and clinical correlates. Journal of Research in Personality, 42(5), 1243–1259. https://doi.org/10.1016/j.jrp.2008.03.009
Olatunji, B. O., & McKay, D. (Eds.). (2009). Disgust and its disorders: Theory, assessment, and treatment implications. American Psychological Association.
Penn (1997, Fall). Food for thought: Paul Rozin’s research and teaching at Penn. Penn Arts & Sciences. https://www.sas.upenn.edu/sasalum/newsltr/fall97/rozin.html
Rozin, P., & Fallon, A. E. (1987). A perspective on disgust. Psychological Review, 94(1), 23–41. doi.org
Sutton, G. W. (2016). A House Divided: Sexuality, morality, and Christian cultures. Pickwick. AMAZON ISBN: 9781498224888
Sutton, G. W., Kelly, H. L., & Huver, M. (2019). Political identities, religious identity, and the pattern of moral foundations among conservative Christians. Journal of Psychology and Theology, 48, pp. 169-187
Tybur, J. M., Lieberman, D., Kurzban, R., & DeScioli, P. (2013). Disgust: Evolved function and structure. Psychological Review, 120(1), 65–84. doi.org
Yip, B. (2025). The ambivalent wisdom of moral disgust. Philosophical Psychology. Advance online publication. https://doi.org/10.1080/09515089.2025.2521437
Post Author: Geoffrey W. Sutton, PhD
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Dr. Sutton’s posts are for educational purposes only. See a licensed mental health provider for diagnoses, treatment, and consultation.
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