=== (AGENDAWATCHDOG) === People who have larger pupils in their eyes are more intelligent than those with smaller pupils, according to a new study.
Volunteers sat reasoning, attention and memory tests so the Georgia Institute of Technology team could investigate the link between pupil size and intelligence.
They found that as well as being linked to arousal and exhaustion, pupil dilation can be used to understand the individual differences in intelligence, discovering that the larger the pupils, the higher the intelligence.
Differences in the baseline pupil size between those scoring highest and those scoring lowest on intelligence tests could be seen with the unaided eye.
The team say this could be due to people with larger pupils having better results regulation of brain activity in a region linked to intelligence and memory.
Researchers had 500 people aged 18 to 35 from Atlanta take part in a range of tests while having their pupil size monitored by an eye tracking device.