What is your IQ?

[Yelnoc]

Prompted by the "Guess the IQ of the Previous Poster" thread; what is your IQ?  The scale is taken from the Stanford-Binet IQ test chart.  My guess is that most people, assuming everyone is honest (please be honest, the poll is anonymous!), will fall under either option 3 or 4.

[Yelnoc]

I agree; "IQ tests" do not measure "intelligence" (which itself is rather difficult to define) but rather a combination of mathematics and vocabulary skills.  It does not measure any inherent quality, but changes dramatically over time.  To prove the point, I looked up the SAT conversion chart.  I took the SAT in 7th grade, as part of the Duke TIP; my combined verbal and quantitative score was around a 1050.  That's a 115 according to the chart.  I took the PSAT Sophomore year, and got a 210 (which correlates to a 2100).  So, assuming my verbal + quantitative was a 1400, my IQ apparently jumped to a 143.  When I get the results back for my actual High School SAT, my "IQ" will probably have jumped another couple points!

Obviously, IQ tests are BS.  But they can be fun to chat about if no one takes it seriously.  I've always wondered if a more objective IQ test is possible; can enough testing create a sound system or is the entire idea silly?

[Yelnoc]

It does not measure any inherent quality, but changes dramatically over time.

These statements are both fairly blatantly incorrect, given the extremely high (~80%) heritability of IQ.  Whether it's what we want to call intelligence is up for debate, I'll acknowledge, but 1) most of the variation in IQ after about age 10/15 is the result of genetic differences and 2) it tends to remain very constant after about the age of 10/15.  (I'll try to cite both, but I was distracted searching for "longitudinal IQ" by studies like this and this!)  It's measuring something very well and very reliably.

Granted, the SAT conversions I used in that post are not the most reliable.  I guess if I took the same IQ test I took at age 7 again at age 17 I would score higher the second time, but if I took it again at age 27, my score should not move?