For many monkeys are stupid and simple, however, increasingly, scientists have evidence otherwise. A recent study with four species of great apes revealed that are able to act by analyzing your chances of success and make decisions more sophisticated than previously thought.
The researchers, whose work was published in the scientific journal PLoS ONE, performed his experiment with bonobos, gorillas, orangutans, and chimpanzees. Presented to the animals two bananas: the lowest was always in the same place and the largest was hidden each time in a different location. The apes were taking decisions based on the probability of success. Chose the smaller banana as more uncertain was the place where obscured the great, that is, the lower was their probability of guessing correctly.
Furthermore, chimpanzees and orangutans were more likely to take risky decisions, while gorillas and bonobos were more cautos in his behavior. This study confirms the idea that the mental activity of apes is much more complex than previously thought.