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Intelligence: Knowns and Unknowns states that psychometric testing, despite being one of the most fruitful approaches to studying intelligence, has yet to produce answers to many questions regarding intelligence. Though psychometricians have devised ways to measure the distinct yet intercorrelated abilities believed to play an important role in the development of intelligence, the correlations between those abilities remain largely unclear. The report asserts that intelligence tests measure important skills, as intelligence test scores correlate moderately well with educational measures. While educational achievement is not primarily determined by intelligence, intelligence test scores do correlate significantly with occupational status later in life.


Feynman's 124: in this context one often hears of Feynman's modest grade school IQ score of 124. To understand this score we have to remember that typical IQ tests (e.g., administered to public school children) tend to have low ceilings. They are not of the kind that Roe used in her study. One can imagine that the ceiling on Feynman's exam was roughly 135 (say, 99th percentile). If Feynman received the highest score on the mathematical portion, and a modest score of 115 on the verbal, we can easily understand the resulting average of 124. However, it is well known that Feynman was extremely strong mathematically. He was asked on short notice to take the Putnam exam for MIT as a senior, and received the top score in the country that year! On Roe's test Feynman's math score would presumably have been > 190, with a correspondingly higher composite IQ.




He obtained a perfect score on the graduate school entrance exams to Princeton University in mathematics and physics — an unprecedented feat — but did rather poorly on the history and English portions.[13]

YanShen wrote:The Feynman number has often been asserted to be flawed. Steve Hsu argues that some tests have relatively low ceilings for math and verbal ability.
http://infoproc.blogspot.com/2008/07/an ... inent.htmlFeynman's 124: in this context one often hears of Feynman's modest grade school IQ score of 124. To understand this score we have to remember that typical IQ tests (e.g., administered to public school children) tend to have low ceilings. They are not of the kind that Roe used in her study. One can imagine that the ceiling on Feynman's exam was roughly 135 (say, 99th percentile). If Feynman received the highest score on the mathematical portion, and a modest score of 115 on the verbal, we can easily understand the resulting average of 124. However, it is well known that Feynman was extremely strong mathematically. He was asked on short notice to take the Putnam exam for MIT as a senior, and received the top score in the country that year! On Roe's test Feynman's math score would presumably have been > 190, with a correspondingly higher composite IQ.


HughMcB wrote:YanShen wrote:The Feynman number has often been asserted to be flawed. Steve Hsu argues that some tests have relatively low ceilings for math and verbal ability.
http://infoproc.blogspot.com/2008/07/an ... inent.htmlFeynman's 124: in this context one often hears of Feynman's modest grade school IQ score of 124. To understand this score we have to remember that typical IQ tests (e.g., administered to public school children) tend to have low ceilings. They are not of the kind that Roe used in her study. One can imagine that the ceiling on Feynman's exam was roughly 135 (say, 99th percentile). If Feynman received the highest score on the mathematical portion, and a modest score of 115 on the verbal, we can easily understand the resulting average of 124. However, it is well known that Feynman was extremely strong mathematically. He was asked on short notice to take the Putnam exam for MIT as a senior, and received the top score in the country that year! On Roe's test Feynman's math score would presumably have been > 190, with a correspondingly higher composite IQ.
Firstly that number was quoted by his biographer, so I'll trust his judgment over yours.
Secondly, so fucking what? Basically what you've quoted actually proves my point.
IQ tests are not reliable references.
YanShen wrote:When the test is carefully constructed by professional psychometricians, the test has good predictive ability. The point made by Steve Hsu was that the particular test was not a professional one, in the sense that it was designed to be administered to typical high school children, and therefore has a relatively low ceiling. Professional tests are able to much more accurately test out to the extremes of the distribution.
I remember taking the Iowa Test of Basic Skills. It capped out at the 99th percentile. This is of course a serious flaw. The difference between someone at the 99th percent and say the 99.999th percent is simply enormous.


alienpresence wrote:They are used in court proceedings here in the UK sometimes. I guess that proves nothing?


YanShen wrote:Let me guess, Hugh will argue that IQ is a meaningless metric, unless of course someone with an IQ of 75 is on trial for murder. Then all of a sudden IQ becomes a tremendously meaningful measure in terms of exculpating the criminal from responsibility for his crimes.





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