Name: 【TED-Ed】什麼？打哈欠也會傳染？！ (Why is yawning contagious? - Claudia Aguirre)
Uploaded: 2014-03-02T18:54:43.000Z
Duration: 4 min 30 s

This phenomenon is known as contagious yawning.

And while scientists still don't fully understand

there are many hypotheses currently being researched.

beginning with two physiological hypotheses

Think of fixed action pattern like a reflex.

in a person nearby that has observed the act.

This occurs when you imitate someone's behavior

a subtle and unintentional copycat maneuver.

People tend to mimic each other's postures.

that we yawn when we see someone else yawn

Scientists believe that this chameleon effect

is possible because of a special set of neurons

變色龍效應可能和特殊的神經元有關

that responds equally when we perform an action

For example, watching someone do something physical,

can help you do those same actions more accurately.

能讓我們精確地做出相同的動作

Our psychological hypothesis also involves

a crucial ability for social animals like us.

allows us to empathize with others' feelings

while testing the first hypothesis we mentioned,

While their study showed this to be true,

Dogs yawned more frequently at familiar yawns,

occurs more frequently among friends than strangers.

在熟人間發生的機率高於陌生人

In fact, contagious yawning starts occurring

when we are about four or five years old,

develop the ability to identify others' emotions properly.

兒童開始能正確了解他人的情緒

Still, while newer scientific studies aim

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【TED-Ed】什麼？打哈欠也會傳染？！ (Why is yawning contagious? - Claudia Aguirre)