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| Re: Why Does Everything Suck? (761835) | |||
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Re: Why Does Everything Suck? |
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Posted by Osmosis Jones on Wed Apr 6 14:36:12 2011, in response to Re: Why Does Everything Suck?, posted by JayMan on Wed Apr 6 14:04:53 2011. Wow you're annoyingHowever, a Black-White difference in brain size is not always found, as shown in a compilation of data from the National Aeronautics and Space Administration [111]. When brain size differences between Blacks and Whites are found, they may have environmental causes. There are several other anomalies for the race/brainsize/ IQ hypothesis. For example, the brain-size/IQ correlation has not been shown to be causal. If bigger brains were smarter because of their size, we would expect to find a correlation within families. Siblings who get larger brains by luck of the genetic draw should also be the ones who have higher IQ scores. In fact, however, there is no such correlation. Schoenemann et al. [114] found that the sibling with the larger brain has no higher IQ on average than the sibling with the smaller brain. Another anomaly is that Albert Einstein’s brain was decidedly smaller, at 1,230 grams, than the overall average found for Blacks in the studies by Rushton. In Ecuador there exists a group of very short-stature individuals whose head size is several standard deviations below the mean [115]. These individuals have not merely normal intelligence but unusually high intelligence, with a majority being among the highest ranking in their school class. Since 1 cubic centimeter of brain tissue contains millions of brain cells and billions of synapses, race differences in brain size help to explain their IQ differences. Indeed, if the racial differences in brain size did not relate to cognitive ability, it would be a mystery why such differences in number of neurons would ever have evolved since they are metabolically very expensive. |
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