Psychological differences between long and short sleepers.
D000328:Adult; D001007:Anxiety; D003405:Creativity; D003863:Depression; D004325:Dreams; D006801:Humans; D007406:Interview, Psychological; D008019:Life Style; D008297:Male; D010551:Personality; D011581:Psychological Tests; D012890:Sleep; D012894:Sleep Stages; D013315:Stress, Psychological; D013997:Time Factors