Why Do We Yawn And Why Is It Contagious?
Why Do We Yawn And Why Is It Contagious?
Someone across the room opens their mouth, takes a long slow breath — and before you even notice, your own jaw is stretching. Nobody's tired. Nobody's out of air. So what is a yawn actually for, and why does one person's spread around a room like it's contagious?
In this video we dig into the psychology and neuroscience behind yawning: why the old "yawning means you need more oxygen" theory completely falls apart under testing, the surprising leading explanation that a yawn is a cooling system for an overheating brain, why you yawn at every transition — waking, sleeping, boredom, even stress — and then the strangest part of all: why catching someone else's yawn has nothing to do with tiredness and everything to do with empathy. We get into why you catch yawns most from the people you're closest to, why dogs catch them from their owners, why babies can't catch them until empathy switches on around age four, and why people who score lower on empathy catch them less. By the end, you'll see a yawn not as a sign of boredom, but as one of the most honest little signals that we're far less separate from each other than we feel.
📚 SOURCES / FURTHER READING:
Oxygen theory debunked — Provine, R. R., Tate, B. C., & Geldmacher, L. L. (1987). "Yawning: No effect of 3-5% CO2, 100% O2, and exercise." Behavioral and Neural Biology, 48(3), 382–393.
Brain-cooling / thermoregulation theory — Gallup, A. C., & Gallup, G. G. (2007). "Yawning as a brain cooling mechanism: Nasal breathing and forehead cooling diminish the incidence of contagious yawning." Evolutionary Psychology, 5(1), 92–101.
Contagious yawning & empathy / social bonds — Norscia, I., & Palagi, E. (2011). "Yawn contagion and empathy in Homo sapiens." PLoS ONE, 6(12), e28472.
Dogs catch their owner's yawns — Romero, T., Konno, A., & Hasegawa, T. (2013). "Familiarity bias and physiological responses in contagious yawning by dogs support link to empathy." PLoS ONE, 8(8), e71365.
Babies don't catch yawns yet — Millen, A., & Anderson, J. R. (2011). "Neither infants nor toddlers catch yawns from their mothers." Biology Letters, 7(3), 440–442.
#psychology #brain #psychologyfacts #scienceexplained #yawning