Horse Memory

There was a rather heated discussion going on a while back about what a horse remembered after a long lay-off. Some said if a horse hadn’t been ridden in 2 yrs or so, they would not remember what they should do (or how to do it well).

Interesting study just done and the digest-version published in The Horse mag. Very interesting stuff. Turns out horses have amazing memories…for both good AND bad.

Check it out:

It seems that elephants aren’t the only large animals out there with an impressive memory: French researchers have confirmed that horses are also able to retain what they learned a long time ago—for better or for worse.

“Once they’ve learned something, they’re not going to forget it easily!” said Lea Lansade, PhD, researcher in the behavior science department of the National Institute for Agricultural Research (INRA) in Tours, France. "And they’re not just going to forget it over time. For riders, that has both pros and cons. If you teach your horse something, he’s going to remember it for years and years, even if you haven’t practiced it in the meantime.
“But the downside is that if he has had a bad experience, he won’t forget that either, and he can pull out his defensive mechanisms against that bad experience many years later,” she said. “He won’t have forgotten it.”
Along with Mathilde Valenchon, MS, PhD candidate in INRA’s behavior science department, Lansade tested 26 horses’ long-term memories. These horses had been used by the same research group in studies related to positive and negative reinforcement two years prior. In one task, the horses had learned to back up when told, “Back!” by the handler and received a food reward. In the second, the horses had to cross an obstacle after hearing a bell ring, to prevent being subjected to a puff of air. In the current study, Lansade and Valenchon tested the horses’ ability to perform the same tasks after two years without practice.

All horses displayed a solid long-term memory in both tasks, regardless of whether the initial reinforcement had been positive or negative and regardless of the horse’s temperament, Lansade said.

“We set out to see how temperament would affect memory, as it does for acquisition,” she said. “But to our great surprise, all the horses—without exception—perfectly retained the exercise they had learned two years earlier, even though none of them had been trained on those tasks during that time. You could almost say it was too easy for them.”
However, when the researchers removed the reinforcement (food reward or air puff) in the current study, the horses tended to stop performing the tasks, she added. And in this scenario, the horses’ temperament appeared to play a role in which ones stopped performing and which ones did not. Specifically, Lansade said, it was the fearful horses in the backing-up test that continued to perform the longest even when the food reward ended. But in the obstacle-crossing test, it was the least sensitive horses that kept performing even when the air puff stopped. Further studies are needed to understand how temperament affects this phenomenon, Lansade said.

Previous research by Evelyn Hanggi, PhD, has already suggested that horses are capable of long-term memory of around 10 years.

Just reflects what the old time horse guys always knew…that’s why teaching a youngster and then turning them out for afew months is never a bad thing and one of the most valuable aspects of a horse is his/her amount of “try” they are willing to put out…

Very true. I don’t know why people hate to admit that animals remember and have emotional lives (watched a great PBS NOVA special on this last night). The science is there.

I’ve always appreciated the long-term memory of a horse. Seems like a no-brainer to me. Especially noteworthy when teaching foals their basics - being haltered, picking up their feet, learning to lead…they learn to like people (or not) right then and there. Everything you do in those first formative couple of years is retained.

Very true - but I think we all knew that. I have an OTTB mare that had been repeatedly hit by a particular person in a particular spot in the arena during her ‘retraining.’ I bought her, moved her, trained her, did very well.

8 years later, I moved back to that area for a summer and took her with me. The facility had changed hands several times, and I ended up moving her back into the same place she lived at during her ‘retraining’ albeit with a new owner/trainer/staff. First ride in that ring and she shied at exactly the same spot where she was repeatedly hit 8 years earlier. Continued to do so for almost a month.

Later that summer, I took her out to an event where said ‘retrainer’ had students competing. Horse wouldn’t go within 20 feet of her in the warm-up ring. Every time she yelled at one of her students, my mare tensed up and scooted the other direction.