Birth Order

Speaking of intelligence, or the lack of it, a new Norwegian study has expanded on previous ones showing first-born children score higher on IQ tests than their siblings. This new study found that second-borns whose older siblings died in infancy, and who were thus raised as the first-born child, also outscored their younger siblings. The study's authors explain these findings, as previous authors have, by siting the greater resources, particularly parental attention, available to single and effectively-first-born children.

* Or the lack of it