Yawning
Part
Main points
Content
Time
Intro
Good afternoon everybody. My name is Huy and welcome to my presentation. Before we begin, let’s watch a short video clip and see if you can guess what the topic is.
Okay, can you figure out what I’m about to discuss? Anyone? Okay, it is pretty obvious that I’m going to talk about yawning. But which aspects of yawning to be exact?
- While you were watching the clip, I was watching you. And almost half of the class yawned at least once. It is called contagion. So yawning is contagious, we all know that. But the big question here is WHY?
- A longer version of the clip has been used in many researches on yawning, and 48% of participants has responded with at least a yawn while watching it. It is called contagion. So yawning is contagious, we all know that. But the big question here is WHY?
- Okay. For the next 15 minutes, I will try to answer the question, Why yawning is contagious. But before discussing about yawning contagion, let’s see why we yawn in the first place. And then, we will get to know how you can evaluate a relationship based on yawning. And if you have any questions, I will be very pleased to answer them at the end of my presentation. Now, let’s begin.
2.12
Reasons for Yawning
3 theories why we yawn
Boredom theory
Physiological theory
Brain-cooling theory
First, most of us blame yawning on being tired or bored. Although we do tend to yawn when bored or tired, this theory doesn't explain why Olympic athletes yawn right before they compete. Olympic athletes obviously are not bored or tired at all when they are about to fight hard for their medals. Therefore, tiredness and boredom are not really the reasons.
Another common hypothesis for yawning is that our bodies tempt to yawn to draw in more oxygen to remove a buildup of carbon dioxide. This theory helps explain why we yawn in groups. Larger groups produce more carbon dioxide, which means our bodies would act to draw in more oxygen and get rid of the excess carbon
Main points
Content
Time
Intro
Good afternoon everybody. My name is Huy and welcome to my presentation. Before we begin, let’s watch a short video clip and see if you can guess what the topic is.
Okay, can you figure out what I’m about to discuss? Anyone? Okay, it is pretty obvious that I’m going to talk about yawning. But which aspects of yawning to be exact?
- While you were watching the clip, I was watching you. And almost half of the class yawned at least once. It is called contagion. So yawning is contagious, we all know that. But the big question here is WHY?
- A longer version of the clip has been used in many researches on yawning, and 48% of participants has responded with at least a yawn while watching it. It is called contagion. So yawning is contagious, we all know that. But the big question here is WHY?
- Okay. For the next 15 minutes, I will try to answer the question, Why yawning is contagious. But before discussing about yawning contagion, let’s see why we yawn in the first place. And then, we will get to know how you can evaluate a relationship based on yawning. And if you have any questions, I will be very pleased to answer them at the end of my presentation. Now, let’s begin.
2.12
Reasons for Yawning
3 theories why we yawn
Boredom theory
Physiological theory
Brain-cooling theory
First, most of us blame yawning on being tired or bored. Although we do tend to yawn when bored or tired, this theory doesn't explain why Olympic athletes yawn right before they compete. Olympic athletes obviously are not bored or tired at all when they are about to fight hard for their medals. Therefore, tiredness and boredom are not really the reasons.
Another common hypothesis for yawning is that our bodies tempt to yawn to draw in more oxygen to remove a buildup of carbon dioxide. This theory helps explain why we yawn in groups. Larger groups produce more carbon dioxide, which means our bodies would act to draw in more oxygen and get rid of the excess carbon