It’s not what you say, it’s the way you say it. It’s the faces and expressions that you make. Forget words and language, horses are paying attention to your emotions with their eyes and ears. And the emotions humans express are affecting them whether we mean for them to or not. “Horses are truly emotional sponges, and they react strongly and very rapidly to our human emotions,” said Dr. Léa Lansade, of the French Horse and Riding Institute and the National Institute for Agricultural Research’s behavior science department, in Tours, France.
The Experiment Shows Strong Reactions
In a recent study, Lansade and her fellow researchers tested horses’ ability to associate human vocal and facial emotional expressions. They projected short video clips without sound of an unfamiliar woman on either side of each study horse. In one video the woman was making an angry face, and in the other, she was making a happy face.
At the same time, the scientists played an audio clip of a different, unfamiliar, woman vocalizing either anger or joy through nonverbal sounds (no words), such as grrr and aah.
The test horses (34 Welsh mares) only interacted with humans for basic maintenance and care. Despite having such a limited relationship with humans and despite being exposed to the emotions of an unknown human, the mares had “strong reactions” to the emotions displayed in the experiment.
The mares’ heartbeats rose dramatically, and their behavior showed signs of stress, with stiff, alert postures, when they heard sounds of angry human emotions compared to happy ones. By contrast, with joyful vocal expressions, they became “more peaceful,” with relaxed postures and lower heart rates.
Staring at the Mismatch
Human facial expressions that did not match the sounds on the audio clips “intrigued” the horses. “They spent much more time looking at the ‘wrong’ image because it was in contrast to their expectations,” Dr. Lansade explained. “This is something we often see in horses, and not just in this study when it comes to reacting to things they don’t expect.”
This high sensitivity to human emotions has led the researchers to urge handlers to take caution when expressing their emotions, because the horses are paying attention and reacting, said Lansade.
“What was really surprising in this study was that we had the horses listen to very short sounds of only a few seconds in length,” she said. “And that immediately provoked a strong emotional response in them, with a changing cardiac rhythm and an alert posture.”
The horses reacted even though they were exposed to recordings that had nothing to do with them. So it’s likely that horses react to human emotions even when they’re not directed toward them, she added.
Whether such interspecies sensitivity is reciprocal remains to be determined, she added.
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