Researchers in Hungary say canines can identify whether the sounds they pick up while snoozing are emitted by a fellow dog or human.
Scientists observed 13 dogs and recorded their brain electrical activity while these pets were asleep to attain their findings.
But their sleep might not be as impenetrable as you might think, a new study suggests. Researchers in Hungary have discovered that canines can identify whether the sounds they hear while asleep are emitted by a fellow dog or a human. These stimuli were, in fact, vocalisations emitted by other dogs and humans. These included yelps, whines and growls, as well as coughs, laughs, sighs and yawns. To avoid startling the dogs awake, the researchers did not use “negative” vocalisations or sounds with sexual undertones.
“Dogs process information about emotional valence and species during sleep, actively reacting to the stimuli of their surroundings even in deep-sleep stages,” the researchers wrote in their paper, recently published in the journal “Scientific Reports”.
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