Your stress dog understands, you know it through smelling! British scholars do experimental arguments, and the smell of the collector when the collector does mathematics
Your pressure, dogs really understand!
However, it is not necessarily sensual, and it may also be pure smell.
Recently, scholars from Queen Bellster University found that dogs can smell the smell produced under pressure.
After testing more than 50 volunteers and 4 dogs, they found that dogs can completely distinguish the smell of human general situation VS pressure mountain, with an average accuracy rate of 93.75%.
This result immediately attracted the onlookers of many netizens, and the picked officer said: I am glad that this is scientifically demonstrated!
I can always feel my anxiety and unhappiness whether through the sense of smell or mind, and then run over to comfort me.
The study appeared on the journal “PLOS ONE” under the American Science Public Library.
The author of the paper said that the study also provided a scientific basis for service and treatment of new skills for assistance dog training.
You have to look at mathematics to find stress
This research only takes three steps:
The first step is to collect the smell that people generate under pressure;
The second step is to let the dog know what is the “smell of people under pressure”;
The third step is to test whether the dog can distinguish the smell when people are under pressure and no pressure.
Let’s look at the first step. In order to accurately get the smell produced under people’s pressure, the method of thinking of the research team is to let volunteers do mathematical problems.
The test requires volunteers to do subtraction from 9000, subtract 17 each time, and report each answer loudly.
The calculation process does not have paper and pen, only mental arithmetic, and researchers will put pressure on volunteers.
For example, always saying “hurry up” and “must be counted in the end”, the volunteers answered right and there is no positive feedback. If the answer is wrong, they will be interrupted and tell them the correct answer.
Whether the volunteers can persist, the entire test will last for 3 minutes.
After the test, wipe the volunteer’s hind neck with a gauze, and then put it into a small bottle. The volunteers can breathe three breaths in the bottle, which is to collect a sample.
Before testing, the subjects will score a score (0-10) at the time, and make a score again when the test is over. When the two scores are reduced by more than 2 points, they can be considered as effective sample.
The final valid sample is 36.
After the person’s experimental sample was collected, he came to the dog.
Earlier research has shown that humans will excrete more sweat under pressure and release more volatile organic compounds (VOC). For example, the research results of Shishengtang said that when people are under great pressure, they will release dyspenogenic sulfide and sulfurite (produced onion and garlic).
This experiment depends on whether the dog can distinguish these differences.
The researchers found 4 dogs, two of which can be cards and 2 hybrid dogs, with an average age of over 2 years old.
Through a specially designed device, a small bottle equipped with smell is placed on the port for dogs to smell. When it chooses the right bottle, it will be rewarded.
At the beginning, two of the three options given in a group of experiments were not flavored, and one was the smell produced under the pressure of the human.
After the dogs are tested 10 times, they can choose the right answer with more than 8 times, which means that it has learned to smell this taste.
On this basis, add interference in the experiment, that is, the smell produced when people have no pressure, and then the dog is required to find the smell when there is pressure.
Experimental settings, every 20 tests are recorded as one round, and dogs can choose the right 16 times in two rounds to continue the experiment.
As a result, the four dogs have completed 36 rounds of tests. The highest accuracy rate can reach 96.88%, with an average correct rate of 93.75%.
At the same time, the experiment also replaced the device several times to ensure that the dogs are not the answers to other odors.
The dog team has been working hard
In addition to the smell of people’s “Alexander”, the dogs also know how to look at their faces.
A study published in “Contemporary Biology” showed that dogs can distinguish people’s expressions when they are angry and happy.
Even the face of strangers can accurately judge.
In addition, Japanese scholars have also found that the risk of disability in the elderly raising dogs is about half of those old people who have never raised dogs.
In fact, this time netizens have also discussed whether cats can accurately judge people’s mood accurately.
Some people say: it is definitely okay.
If you are not in a bad mood, it will do something to make you feel bad.