Why is Yawning Contagious?
Article Sources
- 1. Rundle, Brian K., et al. 'Contagious Yawning and Psychopathy.' Personality and Individual Differences, Pergamon, 5 June 2015, www.sciencedirect.com/science/article/abs/pii/S0191886915003645
- 2. Carey, Teresa. 'Why Are Yawns Contagious? We Asked a Scientist.' PBS, Public Broadcasting Service, 17 July 2018, www.pbs.org/newshour/science/why-are-yawns-contagious-we-asked-a-scientist#:~:text=What is known is that,imitate the actions of others
- 3. AC;, Massen JJ;Dusch K;Eldakar OT;Gallup. 'A Thermal Window for Yawning in Humans: Yawning as a Brain Cooling Mechanism.' Physiology & Behavior, U.S. National Library of Medicine, pubmed.ncbi.nlm.nih.gov/24721675/
- 4. Norscia, Ivan, et al. 'Auditory Contagious Yawning Is Highest Between Friends and Family Members: Support to the Emotional Bias Hypothesis.' Frontiers in Psychology, Frontiers Media S.A., 3 Apr. 2020, www.ncbi.nlm.nih.gov/pmc/articles/PMC7147458/
- 5. Nahab, Fatta B. 'Exploring Yawning with Neuroimaging.' Frontiers of Neurology and Neuroscience, U.S. National Library of Medicine, 2010, www.ncbi.nlm.nih.gov/pmc/articles/PMC4041699/
- 6. Featured Neuroscience Psychology, May 22, 2018, et al. 'Why Do We Yawn and Why Is Yawning So Contagious?' Neuroscience News, 22 May 2018, neurosciencenews.com/yawning-contagious-9112/
- 7. St. Louis Public Radio | By Eli Chen. 'Contagious Yawning, Laughing and Scratching Gives Clues to How the Human Brain Works.' St. Louis Public Radio, 27 Mar. 2017, news.stlpublicradio.org/health-science-environment/2017-03-25/contagious-yawning-laughing-and-scratching-gives-clues-to-how-the-human-brain-works
- 8. 'Yawning: Causes and Reasons for Contagious Yawning.' Medical News Today, MediLexicon International, www.medicalnewstoday.com/articles/318414#Can-one-yawn-too-much
Evolutionary History of Yawns
Yawning may be a leftover evolutionary trait that helped humans communicate before language was developed. Yawns may have sent a message of important information to the community.
When someone yawned, it may have signaled to the group that the person was tired or bored. This may have been critically important if the person yawning was responsible for guarding the group. When others in the group saw the person yawning, they'd know that someone else should take over sentry duty.6Featured Neuroscience Psychology, May 22, 2018, et al. ‘Why Do We Yawn and Why Is Yawning So Contagious?’ Neuroscience News, 22 May 2018, neurosciencenews.com/yawning-contagious-9112/
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