Document Detail

Human time perception in temporal isolation: effects of illumination intensity.
MedLine Citation:
PMID:  9360025     Owner:  NLM     Status:  MEDLINE    
Living in isolation from time cues under relatively high and low light intensities for a total (on average) of 24 days, 18 subjects estimated the passage of time by "producing" short (10 to 120 seconds) and long (1h) intervals throughout the experiments. The 1h productions were independent of light intensity and highly positively correlated with the duration of wake times. The short-interval productions were markedly increased under high light intensity. In a subsample of 6 subjects, the interaction between effects of body temperature and light condition on 10-second production was analyzed. Productions were negatively correlated with body temperature. In both dim and bright light, productions decreased by a factor of 0.7 per degree C. In bright light, production was increased by a factor of 1.2 relative to dim light. This effect was not mediated by body temperature, which itself was on average slightly increased in bright light. Since subjective time is slowed by bright light, objective time seems to pass faster in bright light.
J Aschoff; S Daan
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Chronobiology international     Volume:  14     ISSN:  0742-0528     ISO Abbreviation:  Chronobiol. Int.     Publication Date:  1997 Nov 
Date Detail:
Created Date:  1998-01-06     Completed Date:  1998-01-06     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8501362     Medline TA:  Chronobiol Int     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  585-96     Citation Subset:  IM    
Max Planck Institut für Verhaltensphysiologie, Andechs, Germany.
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MeSH Terms
Body Temperature / physiology,  radiation effects
Circadian Rhythm / physiology,  radiation effects
Environment, Controlled
Time Perception / physiology*,  radiation effects

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