That IQ cap seems to fall close to what I have been telling people for years. There is such a thing as a universally testable IQ. The test had not been developed yet and yet, while the IQ cap seems to fit the bill, I will stop short of saying that it is the test I had been referring to.
I proposed that an IQ ceiling (IQMax) is genetically set and can not be exceeded. Everything after conception plays a role to either a)lower a person’s IQ in relation to IQMax, or b)maintain the present level of IQ of the individual in relation to IQMax. Under ideal conditions (Whatever they are), which includes diet, upbringing, social interaction, and a host of other factors, a person could theoretically achieve a perfect IQ, meaning that their IQ = IQMax. This person could have an IQ of 85 and would nevertheless be considered the perfect intellectual specimen.
IQ can manifest itself in different ways in different societies, depending on what is valued culturally. However, even though cultures and societies change through time, the g is fixed and cannot be determined by writing a test, although it can be approximated through testing to varying degrees. I agree with DSeid on this point.
I have done quite well on IQ and other aptitude tests, but I am starting to think that I am less and less “gifted”. Rather, I am starting to believe that I am really good at getting tested. You see, I have a photographic memory and the ability to retain vast amounts of information. When I take a test of this type, I can draw upon the hundreds, or even thousands, of similar questions I have encountered in the past. At times, though not too frequently, I come across an identical question. Other times, there is a close similarity between questions so I can arrive at an answer far faster than normal. I think that this is the reason that I score so high on tests.
Am I smart? I think I am smart enough to get by.
Can I solve complex problems? Yes but if I have never seen the problem before, it takes me a while. However, more often than not I will eventually solve it.
Can I inflate my test scores by referring to my “cache” of knowledge testing questions? In my opinion, yes.
The point is that in order avoid any type of skewing, it appears that the measure of intelligence must be taken from the mind directly or from the human genome. Paper testing, in my opinion, can not be universal because people create IQ tests to test for a specific manifestation of intelligence.
Just my uninformed opinion.