From Brain Pickings:
“In both writing and sleeping,” Stephen King observed in his excellent meditation on the art of “creative sleep” and wakeful dreaming, “we learn to be physically still at the same time we are encouraging our minds to unlock from the humdrum rational thinking of our daytime lives.”
Over the years, in my endless fascination withdaily routines, I found myself especially intrigued by successful writers’ sleep habits — after all, it’s been argued that “sleep is the best (and easiest) creative aphrodisiac” and science tells us that it impacts everything from our moods to our brain development to our every waking moment. I found myself wondering whether there might be a correlation between sleep habits and literary productivity.
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We ended up with a roster of thirty-seven writers for whom wake-up times were available.
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[W]e settled on a set of quantifiable criteria to measure “productivity”: number of published works and major awards received. Given that both the duration and the era of an author’s life affect literary output — longer lives offer more time to write, and some authors lived before the major awards were established — those variables were also indicated for context.
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The most important caveat of all, of course, is that there are countless factors that shape a writer’s creative output, of which sleep is only one — so this isn’t meant to indicate any direction of causation, only to highlight some interesting correlations: for instance, the fact that (with the exception of outliers who are both highly prolific and award-winning, such as like Bradbury and King) late risers seem to produce more works but win fewer awards than early birds.
Link to the rest at Brain Pickings where you’ll see some cool data visualizations for various writers.