Sleep Stage and Personality Characteristics of "Natural" Long and Short Sleepers

See allHide authors and affiliations

Science  12 Feb 1971:
Vol. 171, Issue 3971, pp. 587-588
DOI: 10.1126/science.171.3971.587


A group of college freshmen that typically slept 5½ hours or less per night and a group that typically slept 9½ 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.