that was my first instinct as well... that its probably something to do with attention span. a lot of these IQ tests requires considerable focus, for 60-75 min

that was my first instinct as well... that its probably something to do with attention span. a lot of these IQ tests requires considerable focus, for 60-75 minutes. there are studies that show a drop in attention span from the 70's to now. I think we are now at 8 min for the average person. its that or there is some common particle that is slowly making us dumb (like lead couple decades ago) and we haven't discovered it yet.