Scroll down to How You Sleep Is Who You Are
Early risers prefer to gather knowledge from concrete information.
They reach conclusions through logic and analysis. Night owls are
more imaginative and open to unconventional ideas, preferring the
unknown and favoring intuitive leaps on their way to reaching
conclusions. ... Morning people are more likely to be self-controlled
and exhibit "upstanding" conduct ... Evening people, by contrast, are
"independent" and "nonconforming," and more reluctant to listen to authority
http://www.theatlantic.com/doc/200712/primarysources
www.peoplewho.org