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The science of laughter - Sasha Winkler

The science of laughter – Sasha Winkler

TED-Ed

1.7M views 2 years ago

Warm-up Questions

When do you usually laugh the most: with friends, with family, or when you are alone?
What do you think the video will say about why laughter exists?
Do you believe laughter can be “good medicine”? Why or why not?

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The science of laughter – Sasha Winkler

What happens in your body when you laugh? (00:00 – 01:09)

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1. According to the video, what happens to your abdominal muscles when you laugh?

They stop working so your chest pressure decreases.
They contract rapidly and change your breathing patterns.
They relax and slow your breathing down.

2. Which is mentioned as a possible sound laughter can produce?

A whistle
A snort
A cough

3. Why is it difficult to know exactly how laughter evolved?

Because there is no archaeological record of laughter.
Because laughter is too rare to study scientifically.
Because only humans laugh, so there are no comparisons.

The science of laughter – Sasha Winkler

Laughter in animals and possible origins (01:09 – 02:42)

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1. What did researchers using ultrasonic recorders realize about rats in the late 1990s?

Rats made giggling-like sounds when tickled.
Rats only vocalized when they were angry.
Rats learned human jokes.

2. What is one theory about why laughter originally developed in apes?

To signal friendly, non-aggressive intent during play
To attract prey during hunting
To warn others about danger

3. After humans developed large social groups and complex language, what did some scientists hypothesize about laughter?

It disappeared from speech and became only for play.
It became useful within speech to convey subtle meanings.
It became quieter so only close friends could hear it.

The science of laughter – Sasha Winkler

Social functions, real vs fake laughter, and health effects (02:42 – 05:32)

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1. In one study, how did having another person present affect participants’ laughter while watching a funny video?

They stopped laughing because they felt judged.
They laughed longer and more often.
They laughed the same amount but felt more amused.

2. What does the video say about fake (volitional) laughter?

It comes from the same brain networks as spontaneous laughter.
It can only be detected by watching someone’s face.
It is produced in different brain networks that rely on speech-like pathways.

3. Which pair is mentioned as something laughter can increase and something it can decrease?

Increase cortisol; decrease endorphins
Increase endorphins; decrease cortisol
Increase stress hormones; decrease neurotransmitters

The science of laughter – Sasha Winkler

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1. Which idea best matches the main message of the video?

Laughter is mainly a learned behavior controlled by language.
Laughter is uniquely human and has no biological purpose.
Laughter likely evolved from play signals and now has social and health functions.

2. Why might human laughter be louder than most animals’ play vocalizations, according to some scientists?

Because it is always produced intentionally.
Because humans have larger lungs than all other mammals.
Because it can act as a broadcast signal to people nearby.

3. What evidence suggests laughter communicates social information?

People worldwide can judge closeness (friends vs acquaintances) from laughter clips.
Only adults can recognize fake laughter.
Babies cannot laugh until they can speak.

Discussion Questions

Discuss the ideas from this video

The science of laughter – Sasha Winkler

Do you think laughter is more about emotion, communication, or health? Explain your choice.
Have you ever laughed in a situation where you were nervous or confused? Why do you think it happened?
Is it easy for you to tell when someone’s laugh is real or fake? What clues do you listen for?
If laughter helps social bonding, how might it affect teamwork in a classroom or workplace?

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