If an individual was approached by someone containing these cues, they would likely react with disgust, which then would have motivated them to avoid the person in question. presence of bodily fluids, lesions, etc.). It’s believed that humans developed the ability to detect cues associated with infectious disease by relying on appearance as a source of relevant heuristics (e.g. A study published in Social Psychological and Personality Science proposed that when people judge someone or something as ugly, it activates their behavioral immune system, which alerts them to the presence of potentially harmful diseases.īefore the days of modern medicine, humans had very few ways of assessing the threat of disease.
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