Document Detail

The effect of color temperature of lighting sources on mental activity level.
MedLine Citation:
PMID:  1567518     Owner:  NLM     Status:  MEDLINE    
The present study was designed to investigate the effects of color temperature of lighting sources on a contingent negative variation (CNV). Eleven male students (mean age, 23.2) volunteered as subjects. The CNV was recorded under three different color temperature conditions (3000 degrees K, 5000 degrees K and 7500 degrees K). The illuminance level was kept at 1000lx. The lighting condition caused no effect on the reaction time of the performance included in the CNV paradigm. On the other hand, the CNV was suggested to be influenced by the lighting condition. Especially, the CNV between 1025 msec to 1125 msec after the warning stimulus (S1) under 7500 degrees K was obviously larger than that under 3000 degrees K. This tendency was observed within the range between 800 msec and 1300 msec. Judging from no correlation between the light condition and reaction time, the concept of readiness potentials has little possibility for explaining the difference in CNV between the lighting conditions. Therefore, the difference in CNV between 3000 degrees K and 7500 degrees K was concluded to be originated from some differences in orienting response. The color temperature of 7500 degrees K was considered to be more activating than the color temperature of 3000 degrees K from the viewpoint of reticular activating system in CNV mechanism.
T Deguchi; M Sato
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Annals of physiological anthropology = Seiri Jinruigaku Kenkyūkai kaishi     Volume:  11     ISSN:  0287-8429     ISO Abbreviation:  Ann Physiol Anthropol     Publication Date:  1992 Jan 
Date Detail:
Created Date:  1992-05-28     Completed Date:  1992-05-28     Revised Date:  2006-02-27    
Medline Journal Info:
Nlm Unique ID:  8506625     Medline TA:  Ann Physiol Anthropol     Country:  JAPAN    
Other Details:
Languages:  eng     Pagination:  37-43     Citation Subset:  IM    
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MeSH Terms
Contingent Negative Variation / physiology*
Reaction Time

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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