Brain-to-body mass ratio
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High Quality Content by WIKIPEDIA articles! Brain-to-body weight ratio is a rough estimate of the possible intelligence of an organism. It can be defined as the ratio of the actual brain weight to the expected brain weight of a typical animal that size, EQ=w/Ew. The formula for the expected weight of the brain varies, but is usually Ew = 0.12w2 / 3, though for some classes of animals the power is 3/4 rather than 2/3. The idea behind EQ is that the larger an organism is, the more brain weight is required for basic survival tasks, such as breathing, thermoregulation, senses, motor skill, etc.…mehr

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High Quality Content by WIKIPEDIA articles! Brain-to-body weight ratio is a rough estimate of the possible intelligence of an organism. It can be defined as the ratio of the actual brain weight to the expected brain weight of a typical animal that size, EQ=w/Ew. The formula for the expected weight of the brain varies, but is usually Ew = 0.12w2 / 3, though for some classes of animals the power is 3/4 rather than 2/3. The idea behind EQ is that the larger an organism is, the more brain weight is required for basic survival tasks, such as breathing, thermoregulation, senses, motor skill, etc. The larger the brain is relative to the body, the more brain weight might be available for more complex cognitive tasks. This method, as opposed to the method of simply measuring brain weight alone, puts humans closer to the top of the list. Also, reflecting the evolution of the recent cerebral cortex, different animals have different degrees of brain folding, which increase the surface of thecortex, which is positively correlated in humans to intelligence.