half the population is below average IQ

I know.
Study pits liberal brains against conservative brains ...
Researchers at New York University examined how a cue was processed in the anterior cingulate cortex of 43 college students. By monitoring brain activity, they were able to see differences in the way that self-described liberals and conservatives avoided a habitual -- but inappropriate -- response.
"Say you drive home from work the same way every day, but one day there's a detour and you need to override your autopilot," David Amodio, the researcher who carried out the study, tells the Chicago Tribune. "Most people function just fine. But there's a little variability in how sensitive people are to the cue that they need to change their current course."
In the end, the liberals proved to be more flexible.
http://blogs.usatoday.com/ondeadline/re ... index.html