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6. A Social Theory For Yawning

Andrew C. Gallup, Ph.D., believes in a physiological cause for yawning and a physical benefit. However, other theorists like Adrian G. Guggisberg, MD, think it has to do with communication and social effects. Although he admits the physiological effects of yawning are present, they are too small to credit for why yawning persisted throughout evolution. Rather, the contagious effect of yawning has to do with social competence and empathy.

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