Physiological and behavioral responses to strangers compared to friends as a source of disgust |
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| Authors: | Ming Peng Lei Chang Renlai Zhou |
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| Affiliation: | 1. Department of Educational Psychology, The Chinese University of Hong Kong, Hong Kong, China;2. Beijing Key Lab of Applied Experimental Psychology, School of Psychology, Beijing Normal University, Beijing, China;3. State Key Laboratory of Cognitive Neuroscience and Learning (Beijing Normal University), Beijing, China |
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| Abstract: | Known as the source effect, feelings of disgust have been found to differ depending on the source of the disgusting material, with that emanating from oneself and familiar others eliciting less disgust than that of strangers. We tested the source effect on self-report of disgust feelings (Study 1), physiological response in heart rate (Study 2), and behavioral response in terms of approach–avoidance movement (Study 3). The results showed significantly higher levels of disgust feelings, more reduced heart rates, and faster avoidance behavior when processing disgusting material associated with strangers compared to that of familiar persons. Together these findings support the evolutionary view that disgust, as part of the human behavioral immune system to drive avoidance from disease-carrying agents, will likely be activated more intensely and quickly in response to unfamiliar as compared to familiar conspecifics who carry common germs more defendable by our shared physical immunity. |
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