What do the dog bosses see when observing humans, do you know?

Can dogs distinguish the human face only by sight? And if so, what are they based on?

After work every afternoon, open the door, a pair of glittering eyes looking up, the tail fluttering excitedly. It is a dog - a human companion for a long history, to the point that not many people now respect them as "bosses" to serve them every day.

But notice this, when you are happy, it seems that the bosses are also more excited, while you are sad, they seem quieter than usual. Of course that does not mean that they will sit in a corner, but can play quietly, or sit down next to you.

This proves that dogs can understand humans. But how do they do that? When they look at us, what do they see?

When you're sad, the bosses seem to be quieter than usual.

Dogs have the ability to receive very good faces, but where do they look to know?

The first is how they identify the owner. Ludwig Hube - an expert from the Messerli Research Institute (Austria) - has conducted an experiment. He gave each of the dogs a tape recording of the lotus voice, and then showed a couple of photos of the lotus to a stranger.

As a result, they look at photos with strangers longer. According to Hube's hypothesis, it's not because they mistaken, but dogs always make a connection between sound and appearance . When hearing a familiar voice, the image is strange, of course they will look closer to rethink.

In another experiment, scientists want to find out which parts of the dog are most attentive when observing the human face. They train dogs to use touch screens to distinguish two faces. They will be rewarded only when the right face is selected.

The results show that their abilities are different, but generally, dogs are very good at distinguishing human faces , especially when they are looking at all the details on the face.

Like humans, they take information as the shapes of the nose, eyes and mouth to distinguish each face. In it, the eye is the signal they read best.

In addition, dogs are considered to be able to distinguish some basic facial expressions , although it is unclear whether they really understand or not.

Dogs are also considered capable of distinguishing some basic facial expressions.

Finding the general rule in how " dog " faces bosses learn about facial expressions is a complex issue, because the amount of information they can receive when observing is very much. But there is a pretty interesting detail that we should pay attention to: most people reveal their teeth when smiling, and when they are angry, they don't.

Thus, the appearance of teeth is what the dog cares about.

This hypothesis is very reasonable because dogs tend to show their teeth when angry and to threaten. Perhaps for them it will be an important "language" so they pay attention.

A more interesting detail is the mechanism of distinguishing between two angry-happy faces of dogs depending on experience. If they have ever seen the lotus get angry or laugh, they will miss it, then use the details to distinguish it in other cases. Even if it's a brand new face, they can still do it.

The observation of dogs is not as bad as we thought

People still say that dogs have extremely delicate noses, but their eyes are far behind humans. However, according to Nathan Williams, a dog behavior researcher in Queensland, dogs have evolved for tens of thousands of years to detect the smallest changes in expression, even when the signs are very faint. , hard to detect.

Dogs have evolved for tens of thousands of years to detect the smallest changes in expression.

"Dogs outnumber us by the ability to recognize every threat from humans," Williams said.

So it is not bad to show that this four-legged friend's ability to observe humans is not bad, right?