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A number of studies have reported a moderate statistical correlation between differences in IQ and brain size between individuals in the same group. [ 178 ] [ 179 ] Some scholars have reported differences in average brain sizes between racial groups, [ 180 ] although this is unlikely to be a good measure of IQ as brain size also differs between ...
The adult human brain weighs on average about 1.5 kg (3.3 lb). [1] In men the average weight is about 1370 g and in women about 1200 g. [2][contradictory] The volume is around 1260 cm 3 in men and 1130 cm 3 in women, although there is substantial individual variation. [3] Yet another study argued that adult human brain weight is 1300-1400 g for ...
Rushton returned to the cranial measurements of the 19th century, using brain size as an extra factor determining intelligence; in collaboration with Jensen, he most recently developed updated arguments for the genetic explanation of race differences in intelligence. [139]
Craniometry is measurement of the cranium (the main part of the skull), usually the human cranium. It is a subset of cephalometry, measurement of the head, which in humans is a subset of anthropometry, measurement of the human body. It is distinct from phrenology, the pseudoscience that tried to link personality and character to head shape, and ...
The amygdala, which is the most researched brain region in racism studies, shows much greater activation while viewing other-race faces than same-race faces. [ 1 ] [ 3 ] [ 12 ] This region of the brain is associated with fear conditioning, and has many connections with the cortex to control the body’s emotional response. [ 3 ]
Several studies have demonstrated correlations between race and brain size, with varying results. In some studies, Caucasians were reported to have larger brains than other racial groups, whereas in recent studies and reanalysis of previous studies, East Asians were reported as having larger brains and skulls.
Other historical studies, proposing a black race–white race, intelligence–brain size difference, include those by Bean (1906), Mall (1909), Pearl (1934), and Vint (1934). Nicolás Palacios After the War of the Pacific (1879–83) there was a rise of racial and national superiority ideas among the Chilean ruling class. [ 86 ]
Brain–body mass ratio. Brain–body mass ratio, also known as the brain–body weight ratio, is the ratio of brain mass to body mass, which is hypothesized to be a rough estimate of the intelligence of an animal, although fairly inaccurate in many cases. A more complex measurement, encephalization quotient, takes into account allometric ...