An important study in Denmark shows IQ measurements of young recruits decreasing by 3 points in a decade. No one knows why in the past it was increasing and no one knows why the trend is reversing in Scandinavia (presumable it will extend to the rest of the world).
Something bad is happening.
The speed of recall, the ability to organize a method to find a solution to the question/problem, and the ability to perform basic language and math skills quickly are what is measured. IQs measured above 160 are not rare, but fall at a couple of Standard Deviations off of the established norm on the Bell Curve. Folks who possess such IQs are often unstable as they are not able to get the information in their heads to work for them in social and vocational situations. Hence "Geeks" and the tendency for Bi-Polar types and many folks diagnosed with other mood and cognitive disorders to possess higher than average IQs. Pic=Flynn.