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Chimpanzee uses innovative foresighted methods to fool humans

Date:
May 10, 2012
Source:
Lund University
Summary:
Chimpanzee Santino achieved international fame in 2009 for his habit of gathering stones and manufacturing concrete projectiles to throw at zoo visitors. A new study shows that Santino’s innovativeness when he plans his stone-throwing is greater than researchers have previously observed. He not only gathers stones and manufactures projectiles in advance; he also finds innovative ways of fooling the visitors.

The series shows the chimpanzee when he slowly moved towards the group of visitors before releasing his projectiles. Note the two projectiles in his left hand. The picture on the left was taken 31 seconds before the throw; the central picture, where he picks up an apple from the water moat, was taken 15 seconds before; the right picture was taken 1 second before the throw.
Credit: Photo by Tomas Persson; Osvath et al, doi/10.1371/journal.pone.0036782.g001

Chimpanzee Santino achieved international fame in 2009 for his habit of gathering stones and manufacturing concrete projectiles to throw at zoo visitors. A new study shows that Santino's innovativeness when he plans his stone-throwing is greater than researchers have previously observed. He not only gathers stones and manufactures projectiles in advance; he also finds innovative ways of fooling the visitors.

The study, which was carried out at Lund University, has been published in PLoS ONE.

The new study looked at the chimpanzee's ability to carry out complex planning. The case study shows how humans' closest relatives in the animal kingdom appear to be able to plan to deceive others, and that they can also plan their deception inventively. The behaviour of the chimpanzee Santino is of particular interest because it is done while the humans to be deceived are out of sight. That means that the chimpanzee can plan without having immediate perceptual feedback of his goal -- the visitors to the zoo -- to aid in his planning.

The subject of the study is Santino the chimpanzee, who achieved international fame in 2009 for his habit of gathering stones and manufacturing concrete projectiles to throw at visitors from the safety of his enclosure at Furuvik Zoo north of Stockholm. His behaviour was reported as an example of spontaneous planning for a future event, in which his psychological state was visibly quite different from that of his subsequent aggressive displays. Previously, such cognitive abilities had been widely believed to be restricted to humans.

The new study sought to collect more detailed data on Santino's projectile-throwing behaviour over the course of the 2010 zoo season.

In the new study, the chimpanzee continued and extended his previous behaviour of caching projectiles for later use in aggressive throwing displays. The new behaviour involved innovative use of concealments: both naturally occurring ones and ones he manufactured from hay. All were placed near the visitors' area. This allowed Santino to throw his missiles before the crowd had time to back away.

The first hay concealment was made after the zoo guide had repeatedly backed visitors away when the chimpanzee made throwing attempts. All concealments were made when the visitors were out of sight, and the hidden projectiles were used when they returned. In order to make the hay concealments the chimpanzee had bring the hay from the inside enclosure. Over the course of the season, the researchers observed that the use of concealments became the chimpanzees preferred strategy. Moreover, Santino combined two deception strategies consistently: hiding projectiles and inhibiting the displays of dominance that otherwise preceded his throws.

The new findings suggest that chimpanzees may be able to represent the future behaviour of others while those others are not present. It is also critical that the chimpanzee's initial behaviour produced a future event, rather than merely preparing for one that had reliably occurred before. This in turn, suggest a flexible planning ability which, in humans, relies on creative re-combining of memories, mentally acted out in a 'what if' future scenario.

The authors of the study are Mathias Osvath, from the Department of Cognitive Science at Lund University, and Elin Karvonen, from the University's Primate Research Station. The article is entitled 'Spontaneous innovation for future deception in a male chimpanzee' and has appeared in the journal PLoS One, published by the Public Library of Science.


Story Source:

The above story is based on materials provided by Lund University. Note: Materials may be edited for content and length.


Journal Reference:

  1. Mathias Osvath, Elin Karvonen. Spontaneous Innovation for Future Deception in a Male Chimpanzee. PLoS ONE, 2012; 7 (5): e36782 DOI: 10.1371/journal.pone.0036782

Cite This Page:

Lund University. "Chimpanzee uses innovative foresighted methods to fool humans." ScienceDaily. ScienceDaily, 10 May 2012. <www.sciencedaily.com/releases/2012/05/120510100225.htm>.
Lund University. (2012, May 10). Chimpanzee uses innovative foresighted methods to fool humans. ScienceDaily. Retrieved October 22, 2014 from www.sciencedaily.com/releases/2012/05/120510100225.htm
Lund University. "Chimpanzee uses innovative foresighted methods to fool humans." ScienceDaily. www.sciencedaily.com/releases/2012/05/120510100225.htm (accessed October 22, 2014).

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