Dogs Hang on Our Every Spoken Word

Dogs mull over human speech much the way we do, and they try hard to decipher what we're saying to them, a new study suggests. The research, published in the journal Current Biology, shows that our dogs are riveted to our words. Study co-author Victoria Ratcliffe, of the School of Psychology at the University of Sussex, said in a press release that dogs are paying attention “not only to who we are and how we say things, but also to what we say.”

Ratcliffe and supervisor David Reby played recorded speech from either side of test-subject dogs, such that the sounds entered each of the dogs’ ears, with the same amplitude. "Although we cannot say how much or in what way dogs understand information in speech from our study," Ratcliffe said, "we can say that dogs react to both verbal and speaker-related information and that these components appear to be processed in different areas of the dog's brain.”

It’s interesting to note that both dogs and humans provide exterior clues about how their brains are operating when listening to sounds. "The input from each ear is mainly transmitted to the opposite hemisphere of the brain," Ratcliffe explained. "If one hemisphere is more specialized in processing certain information in the sound, then that information is perceived as coming from the opposite ear."

For example, if a dog turns to its left while it’s listening, that indicates the information in the sound is heard more prominently by the left ear, suggesting that the right hemisphere of the brain is more specialized in processing that kind of information.