Study Suggests Horses Smarter Than Previously Thought

Horses are a lot smarter than previously believed, according to researchers at Nottingham Trent University in the U.K. The scientists made this argument after a study¹ revealed how horses cleverly adapted their approach to a game in order to get the most treats for the least effort.

First Stage of the Research

Equine scientists at Nottingham Trent University wanted to understand more about the way in which horses learn. This knowledge can be used help train to them more humanely and improve their welfare.

The team developed a task whereby horses touched a card with their noses in order to get a treat. Then they gradually began to make it more challenging.

In the next stage, horses would not get a treat if they touched the card while a light was on. They would get a treat if they touched the card while the light was off.

All horses struggled to perform this task, the study suggested. The horses would indiscriminately touch the card regardless of the light being on or off while still being rewarded for all of their correct responses.

Research Amended

In the final stage of the research, the scientists introduced a penalty for touching the card when the “stop” light was on. They would give the horse a 10-second time out for touching the card when the light was on. During that time the horses were unable to play the game or receive a reward.

What the team found was a sudden and highly significant reduction in errors amongst all the horses involved. They began to play the game correctly. They only touched the card at the right point in order to receive a treat.

The researchers argued that it wasn’t that the horses failed to understand the game as it originally appeared. They think it’s possible that the horses had understood the game the whole time, but had found a way to play so they did not have to pay much attention to the “rules.”

They believe this shows a higher level of cognitive processing than was previously thought possible. The horses were able to instantly switch strategies and behave in a different way as soon as there was a risk of something being taken away from them.

This approach requires the horse to think into the future, the researchers say. This is very goal directed, with horses required to focus on what they want to achieve and the steps they need to take to achieve the goal.

This, they argue, is something which has previously been considered beyond a horse’s cognitive capacity.

Researcher Comments

“At first we found that horses would just keep touching the card over and over, as they probably realised they would still get a frequent reward with minimal mental effort,” said lead researcher Dr. Carrie Ijichi.

“There was no cost for indiscriminate hitting, sometimes it paid off, sometimes it didn’t,” she explained. “When we introduced a cost for their errors, however, they could instantly understand and play the game properly.

“Horses are not natural geniuses, they are thought of as mediocre,” Ijichi added. “But this study shows they’re not average and are in fact more cognitively advanced than we give them credit for.

“We now think that horses may be able to use a form of learning called ‘model-based learning,’ which was thought to be too complex for them,” she explained. “This will now help us to understand their behaviour and capabilities much better.

“It’s fascinating because they have a very underdeveloped pre-frontal cortex, which is what we typically credit with producing that type of thinking in humans,” Ijichi explained. “This means they must be using another area of the brain to achieve a similar result, and this teaches us that we shouldn’t make assumptions about animal intelligence or sentience based on whether they are ‘built’ just like us.”

Researcher Louise Evans, based in Nottingham Trent University’s School of Animal, Rural and Environmental Sciences, said, “We were expecting horses’ performance to improve when we introduced the time-out, but were surprised by how immediate and significant the improvement was.

“Animals usually need several repetitions of a task to gradually acquire new knowledge,” she noted. “Whereas, our horses immediately improved when we introduced a cost for errors. This suggests that the horses knew all along what the rules of the game were.”