Dogs are able to tell the difference between human emotions, according to a recent study. In the past, research has demonstrated that dogs could recognize human emotions, but the dogs were tested by being shown one positive human facial expression and one negative expression.

It was unclear whether dogs could actually distinguish between emotions or only tell the difference between positive and negative moods. Now, researchers have determined that dogs are good at reading our emotions.

A team of researchers showed images of human facial expressions to 14 pet dogs. Then, they used machine learning to analyze their brain scans.

They had to train the dogs to stay still and awake for 10 minutes while they performed MRI scans on the dogs. Once the dogs had been properly trained, the researchers conducted two sets of experiments.

For the first test, the team showed unfamiliar happy or neutral faces to eight dogs while the MRI scanned their brains. When shown the happy faces, the dogs' temporal cortex and caudate nucleus lit up. These parts of the brain are associated with higher cognitive and reward processing.

"Other studies show, for example, that this activation is related when the dog is expecting a snack or a food reward, but also when they hear praise," said Laura Cuaya, a co-author of the study and a neuroscientist at the University of Vienna.

In the second test, 12 dogs were shown happy, sad, frightened, and angry faces. Their brains did not react to negative emotions the same way as positive ones.

While the dogs were interpreting between fear and sadness, a different part of the brain was activated. Another region was activated when distinguishing between fear and anger.

When it came to identifying sadness and anger, there appeared to be no difference, suggesting that dogs may need more than facial cues to recognize the difference between these two emotions.

A Portrait of a young woman on the livingroom with golden retriever dog indoors at home.Louis-Paul Photo - stock.adobe.com - illustrative purposes only, not the actual person or dog - pictured above is a woman hugging a golden retriever

Most of the dogs involved in the study were border collies. They are great at following social cues. Some of the dogs were golden retrievers. There is a possibility that other dog breeds lack the ability to interpret facial expressions.

Overall, the findings of the study have proven for the first time that dogs can register the difference between negative human emotions, such as fear, sadness, and anger.

The study also demonstrated that animals process happy, angry, and scared emotions differently.

Moving forward, the researchers plan to further investigate how dogs navigate the human world and what their brains look like when doing it.

In addition, they will compare how human and dog brains process the same emotional cues. Hopefully, the research will be beneficial to the way pet owners care for their beloved furry friends.

The findings were published in the journal iScience.