An elephant inhibitory control study published on 9 September in PLOS One has produced the first documented evidence that Asian elephants can suppress impulsive behaviour in favour of a more effective course of action, adding measurable weight to what researchers describe as a growing body of evidence for sophisticated elephant cognition.
The work was led by Sydney Hope, a Postdoctoral Fellow at Hunter College, together with Associate Professor of Psychology and Director of ABC Graduate Programs Joshua Plotnik, along with collaborators based in Thailand. Experiments took place at the National Elephant Institute in Thailand.
What the Elephant Inhibitory Control Study Tested
Inhibitory control, the capacity to override an immediate impulse in favour of a more rational response, is well established in humans and has been observed across a range of birds and mammals. It is typically measured using detour tasks, in which an animal must resist an obvious but ineffective path to a reward and instead take an indirect route. Until this study, no such evidence existed for elephants.
The Hunter College team presented Asian elephants with a transparent box containing fruit. Small holes allowed the animals to see and smell the food clearly, but the only workable access point was an opening on the side, which the elephants had been taught to use. Consistently, the animals resisted the temptation to reach directly through the transparent face of the box and used the correct opening instead.
The second phase of the test was more demanding. When researchers rotated the box, the elephants initially reached toward the position where the side opening had previously been, before correcting themselves. That correction was slower in older individuals. One possible explanation offered by the researchers is cognitive decline with age, though the study does not settle the question.
Why the Findings Matter Beyond the Laboratory
Inhibitory control is not merely a curiosity of animal cognition. The research team argues it may be a key component of elephants’ well-documented problem-solving and social skills. As study co-author Dr Sydney Hope put it: ‘When elephants were faced with a situation in which they needed to suppress an impulsive behaviour, either the impulse to reach directly toward a food reward behind a transparent barrier or the impulse to continue using a previously effective technique, they were generally able to suppress the impulse.’ She added that this ability may be important for elephants’ problem-solving.
Plotnik’s own record of research in Thailand spans nearly two decades, combining experimental work with conservation efforts. His published work covers a wide range: elephants recognising themselves in mirrors, consoling distressed companions, coordinating actions with partners, and solving unfamiliar problems. One strand of that research found that elephants living close to human communities tend to show greater willingness to take risks and explore new situations, a pattern that may help explain why certain elephants repeatedly enter agricultural land and come into conflict with people.
The implications for conservation are direct. Human-elephant conflict is a persistent and sometimes fatal problem across South and South-East Asia, and understanding the cognitive processes behind elephant decision-making could inform more effective coexistence strategies. ‘The more we understand about how elephants think, make decisions about risk, and adapt to human-driven environmental change, the better we can predict “what they’ll do next” and the better designed our strategies for human-elephant coexistence can be,’ Plotnik said.
That framing, using cognitive science to reduce conflict rather than simply to satisfy scientific curiosity, runs through much of the team’s work. The fuller picture of Plotnik’s research profile reflects a programme built around the idea that understanding what elephants are capable of mentally is inseparable from protecting them practically.
The study does not resolve every question it raises. The age-related slowdown in behavioural correction, for instance, is flagged as a possible indicator of cognitive change over a lifetime, but the researchers offer it as a hypothesis rather than a conclusion. What the elephant inhibitory control study does establish clearly is a new baseline: these animals can hold an impulse in check, reassess, and choose differently, and that finding now sits in the peer-reviewed record.
