Dogs’ brains are sensitive to the familiar high-pitched “cute” voice tone that adult humans, especially women, use to talk to babies, according to a new study.
The research, published recently in the journal Communications Biology, found “exciting similarities” between infant and dog brains during the processing of speech with such a high-pitched tone feature.
Humans tend to speak with a specific speech style characterised by exaggerated prosody, or patterns of stress and intonation in a language, when communicating with individuals having limited language competence.
Such speech has previously been found to be very important for the healthy cognitive, social and language development of children, who are also tuned to such a high-pitched voice.
But researchers, including those from the Eötvös Loránd University in Hungary, hoped to assess whether dog brains are also sensitive to this way of communication.
In the study, conscious family dogs were made to listen to dog, infant and adult-directed speech recorded from 12 women and men in real-life interactions.
As the dogs listened, their brain activities were measured using a functional magnetic resonance imaging (fMRI) scan.
The study found the sound-processing regions of the dogs’ brains responded more to dog- and infant-directed than adult-directed speech.
This marked the first neurological evidence that dog brains are tuned to speech directed specifically at them.
“Studying how dog brains process dog-directed speech is exciting, because it can help us understand how exaggerated prosody contributes to efficient speech processing in a nonhuman species skilled at relying on different speech cues,” explained Anna Gergely, co-first author of the study.
Scientists also found dog- and infant-directed speech sensitivity of dog brains was more pronounced when the speakers were women, and was affected by voice pitch and its variation.
These findings suggest the way we speak to dogs matters, and that their brain is specifically sensitive to the higher-pitched voice tone typical to the female voice.
“Remarkably, the voice tone patterns characterizing women’s dog-directed speech are not typically used in dog-dog communication – our results may thus serve evidence for a neural preference that dogs developed during their domestication,” said Anna Gábor, co-first author of the study.
“Dog brains’ increased sensitivity to dog-directed speech spoken by women specifically may be due to the fact that women more often speak to dogs with exaggerated prosody than men,” Dr Gabor said.
Are playful dogs smarter? Study finds link between learning and romping
Canine eggheads enjoy playing with toys and retrieving objects.
“Gifted” dogs, who have a rare talent for learning lots of words for objects easily, also turn out to be more playful than other dogs, a new study finds.
Prior research in humans has shown a link between playfulness and problem-solving abilities, so animal behavior researchers from Eötvös Loránd University in Budapest, Hungary, wondered if the same was true for rollicking pups.
What is a gifted dog? In the new study, it was Border collies who had proven in prior research that they were able to learn as many as 12 new words per week and then retain them for months.
To take a closer look at the possible association between giftedness and playfulness in dogs, Claudia Fugazza, a researcher in the university’s department of ethology (the study of animal behavior), and her colleagues asked the owners of 165 Border collies to fill out dog personality questionnaires. Twenty-one of the dogs were gifted and the other 114 were just randomly selected with no testing for word learning ability.
The surveys assessed the personality of the animals in five categories:
- Fearfulness, including fear of people, nonsocial fear, fear of dogs, fear of handling.
- Aggression toward people, including general aggression and aggression in certain situations.
- Activity/Excitability, including excitability, playfulness, active engagement and companionability.
- Responsiveness, such as trainability and controllability.
- Aggression toward animals, including aggression toward dogs, prey drive and dominance over other dogs.
For the evaluation of playfulness the owners were asked to rate their dogs in three areas:
- Dog gets bored in play quickly.
- Dog enjoys playing with toys.
- Dog retrieves objects, such as balls, toys and sticks.
The researchers focused solely on Border collies because earlier experiments found that the breed is more likely to be good at learning new words compared to others.
After collecting the survey responses, the researchers then compared the responses from owners of gifted dogs to those from the owners of dogs who had not been identified as gifted.
Playfulness was the only personality trait that was consistently different between the two groups.
It’s not clear from the study whether it’s the playfulness that helps the dogs learn more words, or whether the extra playful ones ended up with more opportunities to learn, said Fugazza, the study’s lead author, said in an email. That’s because gifted dogs tend to learn words for objects when their owners are playing with them.
Are playful dogs smarter?
Not exactly.
“Intelligence is the result of diverse cognitive traits that allow individuals to flexibly solve different types of problems,” Fugazza explained. “Giftedness refers to an extremely good capacity in the case of a specific skill.”
So, maybe gifted dogs are like people who score high on the verbal part of the SATs.
If your pup doesn’t learn words easily, it doesn’t mean it’s a dumb dog. Adam Boyko, an expert in canine genomics, reassures owners that canine intelligence is more than that.
“Both dogs and wolves are playful when they are puppies, but dogs really evolved to living in the human environment and to responding to social cues,” said Boyko, a specialist in the genetics of behavior and an associate professor at the Cornell University College of Veterinary Medicine. “It’s not surprising that the more playful ones exhibit better learning in the domain of learning human words. And it’s not surprising that Border collies, who are bred to respond to human cues, show the propensity to learn words more than other breeds.”
Other breeds of dogs might show intelligence in other ways, Boyko said. For example, wolves are very intelligent although they don’t typically pick up on human cues.
“But they can figure out how to escape,” said Boyko. “Where dogs would look for a person to help, wolves would see how humans did a latch and lock and then the wolves would do it themselves to get out.”
Boyko would like to take the study a step further and look at the genetics of the gifted dogs.
“This is a tantalizing correlation that might be meaningful if you are trying to build better service dogs,” he said.
One thing that can’t be determined from the study is whether the playfulness trait spurred owners to interact more with their dogs and thus teach them more words, said Dr. Nicholas Dodman, a professor emeritus at the Cummings School of Veterinary Medicine at Tufts University, CEO and president of the Center for Canine Behavior Studies and the author of “Pets on the Couch: Neurotic Dogs, Compulsive Cats, Anxious Birds and the New Science of Animal Psychiatry.”
Dodman said the study is interesting but needs to be replicated in a larger number of dogs.
“I would also like to see it done in a different breed,” he said.
The new findings might help people who want to buy or adopt a puppy. It suggests that playfulness might be a good attribute to consider.
“The playful ones might be more likely to interact with a person, assimilate words more easily and be more intelligent,” said Dodman.
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