More fun with IQ tests

[tevarin]

"Americans made massive IQ gains on the WISC [Wechsler Intelligence Scale for Children] between 1947 and 2002 amounting to almost 18 points of Full Scale IQ. These gains ranged from only 2 points on the WISC subtest called Information to 24 points on the subtest called Similarites (what do dogs and rabbits have in common?), despite the fact that both have the cognitive complexity that makes them good measures of g."

http://www.reason.com/blog/show/123337.html

Smarter immigrants, that's what it is:)
Or maybe just less lead in our diet.