About the mystery of the IQ scores drifting upward: you are only witnessing one capacity undergoing change without checking whether the other capacities are also changing. This is the problem with your formulaic measure of intellect. Again, another forest vs trees issue. You need a wider academic consultation approach. Don't worry, other academic specialties are doing the same thing.,(reply>), They are no longer ‘drifting upward’ and haven’t been for decades.