In June, for example, a group of Norwegian researchers released a study showing
that firstborns are generally smarter than any siblings who come along later,
enjoying on average a three-point IQ advantage over the next eldest—probably a
result of the intellectual boost that comes from mentoring younger siblings and
helping them in day-to-day tasks. The second child, in turn, is a point ahead of
I usually look at surveys and reports like these and look at them from a personal perspective. With respect, I think this one is rubbish. I have two sisters and I readily admit that one of them (I'm not saying which one!) probably has a far higher IQ than me. Indeed, when I think of my friends and relations it is often the second child who is cleverer. Maybe things are different in Norway!