Can Pupil Size Predict IQ?
Could IQ--a famous standard of intelligence that has long eluded quantification--be as easy to measure as pupil size? Could the reason why establish a link between norepinephrine and fluid intelligence (and therefore, Mental Mojo consumption--See last paragraph)? Georgia psychologists Jason Tsukahara and colleagues hypothesize affirmatively in a paper they published two months ago. First a little background. Pupils have long been known to vary in size due to changes in emotional state and cognitive effort (i.e., brain strain). As Tsukahara writes: Starting in…