>BUT IN A GIVEN INDIVIDUAL an increase in adult brain size would be
expected
>to have a positive effect on IQ.

Why are we saying this?  I have read that at about age 5 a drastic
reduction in connections is made in the brain, causing it to form its
adult functional systems.  I have also read that people who are autistic
have improper connections among the various areas of the brain.  Their
large heads may be a compensation in size for the disorganization of
their thinking organ.  So I don't see why one would automatically assume
that a brain that is overall "large" on the outside would necessarily
increase the aspect of brain function that we label "I.Q." (and we don't
really know what that is, anyhow!).

 I never thought that brain size related to
>IQ on a community basis. ie if you or Einstein were better nourished
such
>that your brain size increased by 10% would your and his IQ go up? I
think
>the answer is yes. Not only would it be bigger but by being better
nourished
>it would be of better structural quality.

It has been shown that Einstein's brain was not "normal" in structure.
He was apparently able to use visualization much better than the rest of
us due to the enlargement of a single area of his brain.

Patty