The crow's and chimpanzee's judgment are equal, the size of the brain is not related to the intelligence of the animals

ByNikita

The idea that "the brain is bigger in intelligence is the higher intelligence" was the common belief among biologists, but the latest research suggests that crows of smaller brains than primates are equivalent to primates in experiments to test self-regulation It is obvious that you have the intelligence of.

Ravens, New Caledonian crows and jackdaws parallel great apes in motor self-regulation despite smaller brains | Open Science
http://rsos.royalsocietypublishing.org/content/3/4/160104

When it comes to brains, size does not matter | Ars Technica
http://arstechnica.com/science/2016/04/when-it-comes-to-brains-size-doesnt-matter/

Birds of the crowaceaceae such as crows and ravens have the same social group as the primates, using tools, solving puzzles, recognizing faces, mischiefing cats, etc. It is a wise animals with intelligence, called "ape with wings". However, it has been believed for a long time that "the size of the animal's brain is related to the intelligence of the animal, and the brain's bigger animal is more intelligent". In a previous study on self-controllability of apes and birds, we conclude that "apes are more intelligent because apes are larger birds than birds, apes are more intelligent."

ByEliya

Therefore, in the latest research, focus on birds of the crowaceaceae family who do not dedicate birds to one another and are considered to have the most intelligence among birds. In order to measure the intelligence of the birds of the crowaceacea, we conducted a test to measure the self-controllability called "cylinder task". Cylinder task is a test used to measure the intelligence of various animals, including humans, to evaluate the power of thought. In the cylinder task, first prepare a door with an opaque cylinder at one end, show the animal that the researcher puts food in the cylinder, and teach that you can get food by opening the door. When the animal gets used to this cylinder, replace the cylinder with a transparent one. At this time the animal needs to have the judgment to choose actions such as "clap a transparent cylinder to take food" or "open a cylinder door to eat food".

According to animal researcher William Roberts, animals without self-control can not make decisions in situations where future vision is needed in this way, they will be tied to the food in front of them It is said that. On the other hand, an animal with self-control can judge the situation, go around to the end of the cylinder and take out the food.

When researchers imposed cylinder tasks on three kinds of birds, Raven, Kokumaru and New Caledonia, all the crows succeeded in opening the door and taking out food without being caught by the immediate food. From this experimental result, it became clear that birds of the family Ceracea have the same high level of self-regulation as chimpanzees.

ByAndrew Reding

In addition, despite the size of one-twentieth of the chimpanzee's brain, the Raval-glass brain had exactly the same cylinder and task scores of ravens and chimpanzees. In addition, it seems that ravaged glass has higher score compared to Bonobo which is 70 times larger than Ravens and 94 times larger gorilla. In other words, the size of the brain proved not to be an indicator of intelligence. However, it is said that the size of the brain may be related to the intelligence level of the animal belonging to the animal because the bird is the largest among the cabbage birds. The reason for the high intelligence of humans and apes compared to other animals is not because the brain is large but the complexity of the cranial nerves and the number of connections between neurons can be mentioned.