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Encephalization quotient (EQ), encephalization level (EL), or just encephalization is a relative brain size measure that is defined as the ratio between observed and predicted brain mass for an animal of a given size, based on nonlinear regression on a range of reference species.
A standard measure for assessing an animal's brain size compared to what would be expected from its body size is known as the encephalization quotient. The encephalization quotient for humans is between 7.4-7.8. [61] When the mammalian brain increases in size, not all parts increase at the same rate. [62]
It has been argued that the animal's ecological niche, rather than its evolutionary family, is the main determinant of its encephalization factor C. [17] In the essay "Bligh's Bounty", [18] Stephen Jay Gould noted that if one looks at vertebrates with very low encephalization quotient, their brains are slightly less massive than their spinal ...
Although many animals respond to a mirror, very few show any evidence that they recognize it is in fact themselves in the mirror reflection. The Asian elephants in the study also displayed this type of behavior when standing in front of a 2.5-by-2.5-metre (8.2 ft × 8.2 ft) mirror – they inspected the mirror and brought food close to the ...
Download as PDF; Printable version; ... These are timelines of brain development events in different animal species. ... Encephalization quotient; Evolution of the brain;
Proxies for animal intelligence have varied over the centuries. One early suggestion was brain size (or weight, which provides the same ordering.) A second proposal was brain-to-body-mass ratio, and a third was encephalization quotient, sometimes referred to as EQ.
A formula called the encephalization quotient (EQ) expresses a relationship between brain and body size; it was developed by H.J. Jerison in the late 1960s. [158] When the encephalization quotient is plotted as a curve, an animal with an EQ above the curve is expected to show more cognitive ability than the average animal of its size, whereas ...
A female bottlenose dolphin performing with her trainer. They are considered one of the most intelligent cetaceans. Cetacean intelligence is the overall intelligence and derived cognitive ability of aquatic mammals belonging in the infraorder Cetacea (cetaceans), including baleen whales, porpoises, and dolphins.
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