New Research: Dogs Really Do Know When We’re Sad

dogs can recognize human emotions

Any canine-lover will tell you that dogs somehow know when we’re sad, they know when we’re angry, and they know when we’re happy.

But it was assumed that these were learned behaviors. A new study has come out that claims dogs are can recognize emotions in a much more complex way.

The following is an edited press release:

For the first time, researchers have shown that dogs must form abstract mental representations of positive and negative emotional states, and are not simply displaying learned behaviors when responding to the expressions of people and other dogs.

“It has been a long-standing debate whether dogs can recognize human emotions. – Co-author Professor Daniel Mill”

The findings came from a team of animal behavior experts and psychologists the University of Lincoln, UK, and University of Sao Paulo, Brazil, are published in the Royal Society journal Biology Letters.

The researchers presented 17 domestic dogs with pairings of images and sounds conveying different combinations of positive (happy or playful) and negative (angry or aggressive) emotional expressions in humans and dogs.

These distinct sources of sensory input – photos of facial expressions and audio clips of vocalizations (voices or barks) from unfamiliar subjects – were played simultaneously to the animals, without any prior training.

The team found the dogs spent significantly longer looking at the facial expressions which matched the emotional state (or valence) of the vocalization, for both human and canine subjects.

The integration of different types of sensory information in this way indicates that dogs have mental representations of positive and negative emotional states of others.

Researcher Dr Kun Guo, from the University of Lincoln’s School of Psychology, said: “Previous studies have indicated that dogs can differentiate between human emotions from cues such as facial expressions, but this is not the same as emotional recognition.

“Our study shows that dogs have the ability to integrate two different sources of sensory information into a coherent perception of emotion in both humans and dogs. To do so requires a system of internal categorization of emotional states. This cognitive ability has until now only been evidenced in primates and the capacity to do this across species only seen in humans.”

Many dog owners report anecdotally that their pets seem highly sensitive to the moods of human family members.

“However, there is an important difference between associative behavior, such as learning to respond appropriately to an angry voice, and recognizing a range of very different cues that go together to indicate emotional arousal in another. Our findings are the first to show that dogs truly recognize emotions in humans and other dogs.

“Importantly, the dogs in our trials received no prior training or period of familiarization with the subjects in the images or audio. This suggests that dogs’ ability to combine emotional cues may be intrinsic. As a highly social species, such a tool would have been advantageous and the detection of emotion in humans may even have been selected for over generations of domestication by us.”


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51 thoughts on “New Research: Dogs Really Do Know When We’re Sad

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