Diurnal variation in mood and performance in a time-isolated environment.

@article{Monk1985DiurnalVI,
  title={Diurnal variation in mood and performance in a time-isolated environment.},
  author={Timothy H. Monk and Jeffrey E. Fookson and Margaret Moline and Charles P. Pollak},
  journal={Chronobiology international},
  year={1985},
  volume={2 3},
  pages={
          185-93
        }
}
In order to document circadian rhythmicity in various psychological functions under the chronobiologically 'pure' condition of temporal isolation, a battery of mood and performance tests were administered about 6 times per day to a heterogeneous group of 18 subjects (ages 19-81, 5 female). Each subject spent about 5 days in temporal isolation, entrained to a routine equivalent to his/her own habitual sleep/wake cycle. Average time of day functions were obtained for the mood and performance… 

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