
04/04/2025
A recent study in Applied Animal Behaviour Science (Lesimple et al., 2025) investigated object permanence in horses, a key cognitive ability related to understanding that objects continue to exist even when out of sight.
The experiment, involving 63 horses, revealed that horses can locate a hidden treat even when the hiding process is not visible to them.
This suggests they reach at least Piaget's stage 4 of object permanence (where infants begin to understand that objects continue to exist even when hidden, and they will actively search for them.)
The researchers used a simple task where horses had to find a carrot hidden under a bucket and control groups were used to ensure that the horses weren't simply relying on their sense of smell to find the treat.
The experimental group achieved a success rate of 93.1%, while a control group that also familiarised with the task, but with no treat, had a 100% success rate in uncovering the location where the treat would theoretically be.
Another control group that did not go through familiarisation had a success rate of 60%, suggesting the bucket itself did not intrinsically drive exploration.
This study adds to the limited body of research on equine cognition, an area that has significant gaps, especially when compared to research on other species like primates or even domestic animals like dogs.
Brubaker and Udell (2016) pointed out that rat cognition studies outnumber those of horses by a factor of seven.
Study: To see or not to see: Horses’ ability to find the hidden treat: Applied Animal Behaviour Science, Volume 285, 2025.