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.
COVID-19: Rescue dogs shot dead in Australia over coronavirus restrictions
A council in Australia killed the impounded animals to prevent volunteers at an animal shelter from travelling to pick them up and potentially spreading the virus.
Fifteen rescue dogs, including 10 puppies, have been shot dead by a rural Australian council under its interpretation of coronavirus restrictions.
Bourke Shire Council in New South Wales destroyed the canines, which had been at its pound, to prevent volunteers at an animal shelter from travelling to pick them up and potentially spreading the virus.
“The council decided to take this course of action to protect its employees and community, including vulnerable Aboriginal populations, from the risk of COVID-19 transmission,” the Office of Local Government, a government watchdog, told The Sydney Morning Herald.
The spokesman said officials were investigating whether any animal cruelty laws had been broken.
Five of the dogs had been housed at the pound since early August and one of the dogs then had 10 pups.
The council said staff became concerned for the welfare of the animals due to overcrowding at the pound and two of the dogs attacking one of the others.
A source said the shelter volunteers were distressed and already had COVID-safe measures in place to handle the dogs.
And comedian Ricky Gervais has expressed his disapproval of the killings on social media.
Bourke Shire Council told ABC News the dogs were euthanised because the rescue organisation was from another local government area and they had concerns about people from other communities entering Bourke.
All of regional New South Wales has “stay-at-home” orders in place due to COVID-19.
The council said it had contacted its usual dog rehomer, who is based in the same area, but they were unable to come to Bourke.
The shelter that was supposed to receive the dogs declined to comment.
Animal Liberation regional campaign manager Lisa Ryan has called for an urgent investigation.
“We are deeply distressed and completely appalled by this callous dog shooting and we totally reject [the] council’s unacceptable justifications that this killing was apparently undertaken as part of a COVID-safe plan,” she said.
Australia has recently seen a surge in COVID-19 cases, forcing the country’s largest city, Sydney, to extend its lockdown through September and impose tougher restrictions, such as a curfew and a mask mandate outdoors.
Staff are allowed to work at animal shelters even when lockdown measures are in place, according to the Office of Local Government spokesman.
“Councils are also encouraged to continue to work with re-homing organisations and volunteers to care for animals, where that can be undertaken consistent with NSW Health advice,” he added.
Leave a Reply