Monkeys with strong social skills exhibit enhanced impulse control: Study - Hindustan Times
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Monkeys with strong social skills exhibit enhanced impulse control: Study

ANI |
Jun 08, 2023 05:29 PM IST

Researchers assessed three species of macaques with different social tolerance levels, from authoritarian to more relaxed societies.

Non-human primates have been used by researchers to test one of the theories put up to explain how humanity developed to become smarter.

Tonkean macaques, which are known to get along with each other the most with more diverse and complex relationships, demonstrated better overall control of distraction, emotions. (Representational Image) (Shutterstock)
Tonkean macaques, which are known to get along with each other the most with more diverse and complex relationships, demonstrated better overall control of distraction, emotions. (Representational Image) (Shutterstock)

A team from the University of Portsmouth led a study that discovered a strong link between monkeys' social organisation and their cognitive abilities.

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They assessed three species of macaques with different social tolerance levels, from authoritarian to more relaxed societies, in a series of cognitive touchscreen tasks to work out how impulsive and reactive they were.

Tonkean macaques, which are known to get along with each other the most with more diverse and complex relationships, demonstrated better overall control of distraction, emotions and actions compared to the less-tolerant long-tailed and rhesus species.

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Lead author and PhD researcher, Dr Louise Loyant from the University of Portsmouth's Centre of Comparative and Evolutionary Psychology (CCEP), said: "This relationship between social tolerance and cognitive abilities could explain why Tonkean macaques are better at managing complex relationships with others.

"This is important, as it improves our understanding of our own social evolution. Macaques live in complex communities, not too dissimilar from our own, and we can learn a lot from them.

"Existing research on human inhibitory control, or self-control, suggests the better a person is at managing their emotions and reactions, the more successful they're likely to be in life; whether that be in relationships, work, or just generally. Our results support this hypothesis."

The study, published in Animal Cognition, also highlighted the influence of ecological factors on self-control skills. Different risks and environmental pressures faced by each species might have shaped their behaviours, emotions, and impulsivity levels.

Long-tailed and rhesus macaques living in areas with a greater number of predators, displayed more reactive and cautious behaviours, while Tonkean macaques who face lower predatory risk, exhibited quieter and less reactive behaviours.

The researchers say that both social and ecological factors may jointly influence self-control skills in primates.

Senior co-author, Dr Marine Joly from the CCEP, explained: "A macaque living in a more competitive environment would benefit from learning how to contain inappropriate behaviours, like feeding or mating, if they're around others higher up in the social pyramid.

"But there's also the hypothesis that our closest primate species have evolved over time to have increased brain size and higher cognitive performances, including better self-control.

"Our findings support both of these potential explanations, as well as suggest that species living in more complex societies might have better socio-cognitive skills too, including perception, attention, memory and action planning."

The team evaluated the performance of 66 macaques from two institutions, the Medical Research Council Centre for Macaques in the UK and the Centre of Primatology of the University of Strasbourg in France.

While the study provides valuable insights, the researchers acknowledge some limitations, including the sample size and some prior cognitive testing experiences among the species. They recommend further research involving a larger number of macaques, as well as a closer evaluation of an individual's reactions and results.

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