Sleep stage and personality characteristics of "natural" long and short sleepers.
A group of college freshmen that typically slept 5(1/2) hours or less per night and a group that typically slept 9(1/2) hours or more did not differ significantly on a battery of personality, scholastic, and medical measures. Compared with control subjects not selected on a sleep length criterion, electroencephalograph recordings of the short sleepers contained reduced amounts of stage 2 and rapid eye movement sleep.
D001077:Aptitude Tests; D003863:Depression; D004569:Electroencephalography; D006801:Humans; D007439:Introversion, Psychological; D008950:MMPI; D010555:Personality Inventory; D011603:Psychophysiology; D012890:Sleep; D012894:Sleep Stages; D012895:Sleep, REM; D013334:Students; D013997:Time Factors; D014495:Universities