Who's Smarter: Night Owl or Morning People?

Early birds may catch the worm, but night owls have higher IQs. Hey, don't take my word for it - it's been proven, you know, by science:

Research examining various psychological correlates of circadian type (also known as diurnal preference) has been, over the years, quite expansive. A notable omission within this research program would appear a systematic exploration of the relation between intelligence and morningness–eveningness. The present study redressed this imbalance. 420 participants performed two self-report inventories assessing circadian type, as well as measures of intelligence from two psychometric batteries: CAM-IV and the ASVAB. The results indicate that, contrary to conventional folk wisdom, evening-types are more likely to have higher intelligence scores. This result is discussed in relation to current theories concerning the nature of human cognitive abilities.

The 1999 study: Morningness-eveningness and intelligence: early to bed, early to rise will likely make you anything but wise! by Roberts RD and Kyllonen PC, Dept. of Psychology, University of Sydney, Australia - via Barking up the wrong tree

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I used to be a night owl when I was younger, but now my body won't let me stay up late. So I wake up like 5 AM and sleep before midnight after my late dinners. :(
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I used to wake up around 4 or 5am every day. Once I quit smoking, I can sleep until 10am without any problem. I used to get a lot more done when I got up earlier.
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