<p>Thanks trout, for one of the better replies in this thread.</p>
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<p>I agree that these are clear shortcomings. If there was more data, I’d gladly use it. Alas, there is not. However, 900 is still, by rounding to the closest integer multiple of 50%, approximately 50% of our national club’s members (that is, at least 25% and less than 75%).</p>
<p>I think, and I hope you agree, Mensa members not representing the whole 98th percentile population is a more probable problem than the possibility of survey answerers not representing the whole Mensa population, based on just the ratios.</p>
<p>Thus, for the sake of this argument it should be an important point to think what kind of subpopulation of the 98th percentile actually joins the Mensa. If it was (re succinct mood: should I use ‘were’ here?) the laziest and the most uneducated portion, the average IQ of the whole PhD population would go up. And vice versa: if it was the most active and educated portion, the average IQ of PhD holders would go down. This is a very significant question, because it determines how big errors are caused by assuming the random sampling.</p>
<p>I have no educated guesses or real data about what portion that might be, though obviously it has to be described by more than the two sample qualities I mentioned above. I warmly welcome any speculation, but before any good reasoning or data is available I will continue assuming that they are randomly picked from the total 98th percentile, only because I believe that assumption is likely to be the least wrong (or rather: the expectation value of the wrongness of the assumption is, I believe, the lowest).</p>
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<p>Yes, I might. Or, I might not. Obviously, that also depends greatly on how you define success. Nevertheless, I don’t think we have any evidence to support either opinion based on any sensible definition of success.</p>
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<p>What you say is true. I hoped to make it very clear that whenever I use “IQ” or “intelligence” I only mean logical problem-solving thinking ability. For more wordy definition I’d use something like “the ability to see structure in a sequence of events”. This is not because I believe it to be the only form of intelligence, but instead for the sake of simpler writing.</p>
<p>And lastly,
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<p>I’m not sure why they would giggle over three or four hours spent in high school. I’m not sure how much better my publication list would be had I spent that time in some other way. Also, I was led to believe that 80th percentile is actually a score good enough that it should be mentioned. Do you disagree? Or do you think the value of percentile-score varies with different tests?</p>
<p>LastThreeYears:</p>
<p>Well, I suggest you read the thread again, then. The point was the address the very widespread false assumption that the average IQ of physics PhD’s is 130ish. I believe the point was met, of course assuming my data is in fact real and that the problems with data set are not significant. The statistical probability of me getting answers to my questions is extremely low, but still I ask: what part of the post was nonsense? I mean, of course it’s fun trying to appear cool by saying tough things like that, but it’s not like we are 14 years anymore.</p>
<p>Also, most adult males would beat most 6-year old males in a personal combat. Would you say “guess age beats <other qualities=”" relevant=“” to=“” personal=“” combat=“” performance=“”> every time."?</other></p>
<p>wis75:</p>
<p>I believe I can not reply anything meaningful to the most parts of your message, but here’s what I was able to do:</p>
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<p>Nice. Feel free to elaborate. Do you mean writing long messages means the writer has no life? If not, I completely missed what you mean.</p>
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<p>And you know this exactly how? Is there some data about college/chemistry student IQ that I missed? Are you implying that athletic scholarships require high IQ? Of course severe brain damage patients are a different story, but I assume you mean something like 2nd percentile.</p>
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<p>Although it can’t probably be avoided, I truly mean no offence when I say this: that is by far the best thing you have said in the whole thread, and it summarizes very well what I think about the subject. You caught me by surprise, but damn, that really was a nice pair of sentences.</p>
<p>So, it seems like the topic of our main disagreement is about the average IQ of college/PhD students. I can’t really do much if you refuse to read the reply in which I describe what kind of data I have and what does it say. You could, of course, provide contradicting data.</p>