christianjb said:
The Q is not flawed in any way that I can see.
1) An IQ <130 is surprisingly low for someone of the caliber of Feynman who would easily be in the top percentile by other measures of intelligence (e.g. math ability).
2) If it's true that Nobel prize winners do indeed score no higher than the average PhD then that is interesting evidence for suggesting that IQ tests can't discriminate genius. (Maybe it's not- I'm not entirely certain.)
In any case- most posters here are quite willing to offer their opinions without actually considering the data or looking at the evidence. Doesn't sound very scientific to me.
We've had a ton of past threads at this site regarding IQ, and have examined a good deal of the evidence, most of it highly flawed. There's a lot of circular reasoning employed of the following type:
X group of people are smarter than Y group of people.
X group of people has a higher IQ than Y group of people.
Therefore, higher IQ is a good measure of distinguishing smartness between X and Y groups of people.
BUT...how did someone determine initially that X group of people is smarter than Y group of people? Oh, because in the past, X group was determined to have higher IQ than Y group.
It's also flawed to think that Nobel winners are necessarily smarter than the "average" Ph.D. How would you assess that?
While they certainly do have to be good scientists, often the discovery that wins them an award is accidental. The thing they are good at is recognizing the importance of it to follow it up, not so much that they were thinking way beyond the level of other scientists at the time.
3) I agree that IQ tests were initially developed in part to select problematic (i.e. low-scoring) children. That's neither here nor there. The tests have obviously moved on beyond their original intention and they are now commonly used to measure high IQ's (e.g. in Mensa applications).
Common usage does not mean correct usage, and is as unscientific a claim as that you are accusing others of. That people use the tests for purposes beyond their original intention does not mean that they are validated for those purposes.
How do you rank "smartness" independent of an IQ test? What criteria are used to validate such a test in the average to above-average range? All it really tests are measures that the test writer considers important for intelligence. Who is smarter? The person capable of doing complex math problems, or the person who is good at social networking who can find someone else to do those problems for them when they need it? Who is smarter? The architect who draws up a set of blueprints for a building, or the construction workers who have to read and interpret those blueprints and turn them into an actual building?
There is a lot of observer bias in interpreting these numbers too. You see a famous scientist with a high IQ and say, "Oh, he's really smart, and has a high IQ, so high IQ must be consistent with smartness." But, all the people with high IQ who never became anything because they completely lacked motivation are ignored, as are those with lower IQs who are successful (because who is going to publicize that their IQ is 98). Those with high IQs AND big egos are the ones trying to promote that their high IQ has significance other than to say they are not mentally deficient.