Interesting article from Robert Alison in the Winnipeg Free Press earlier in the year:
Sleep is a fundamental component of animal biology. New evidence confirms that, in humans, its timing reflects intelligence. People with higher IQ’s (intelligence quotients) tend to be more active nocturnally, going to bed later, whereas those with lower IQ’s usually retire to bed sooner after nightfall.
The precise function of sleep is arguable. But, accumulating evidence shows that lack of sleep in humans and animals can result in obesity, high blood pressure and reduced life spans. Drowsiness impairs mental performance. For instance, 37 per cent of all motor vehicle accidents are caused by drowsy motorists, according to a University of Pennsylvania study. Even minor sleep deficiencies impact on body chemistry.
According to Juliette Faraco of Stanford University, sleep loss generates a proportionate need for “sleep rebound”. One of the most controversial and significant recent findings is the correlation in humans between the earliness/lateness of sleep preferences and intelligence.
Robert Bolizs at Semmelweist University, and his coworkers, have shown that encephalograms during sleep illustrate how sleep elements are directly related to “wakeful cognitive performance.” Studies by researchers H. Aliasson and colleagues show the timing of intervals of sleep “correlates closely” with student academic achievement.
Extensive research by Satoshi Kanazawa and colleagues at the London School of Economics and Political Science have uncovered significant differences in sleep-timing preferences among people, depending on their IQ scores. People with higher IQ’s are more apt to be nocturnal night-owls. Those with lower IQ’s tend to restrict their activities primarily to daytime.
Read More in the Winnipeg Free Press