Originally Posted by ElizabethN
People with high IQs really DO see ... process sensory information differently

Quote
The results show that individuals with high IQ can pick up on the movement of small objects faster than low-IQ individuals can.

...

The surprise came when tests with larger objects showed just the opposite: individuals with high IQ were slower to see what was right there in front of them.
Noted intelligence researcher Arthur Jensen found that reaction time is negatively correlated to IQ (smarter people are faster on average) and wrote a book "Clocking the Mind: Mental Chronometry and Individual Differences" (2006).