Effects of Color Temperature and Brightness on Electroencephalogram Alpha Activity in a Polychromatic Light-emitting Diode
Clinical Psychopharmacology and Neuroscience
; : 126-131, 2013.
Article
em En
| WPRIM
| ID: wpr-44840
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WPRO
ABSTRACT
OBJECTIVE: It has been reported that working and learning efficiency might be increased through artificially controlling the color temperature and brightness of light. However, the neurological bases of these outcomes are not well established. Our study was designed to observe whether electroencephalogram (EEG) alpha frequency, as a candidate biological marker, demonstrates significant changes in response to alterations of specific light parameters. METHODS: Thirty-two healthy subjects performed cognitive tasks under four different polychromatic light conditions: a combination of two different levels of color temperature (2766K vs. 5918K) and brightness (300 lux vs. 600 lux). Spectrum analyses were performed on alpha frequency. RESULTS: Subjects reported that they felt more pleasant in bright conditions and more relaxed in warm color temperature conditions. Our findings indicate that alpha power increases in warm, low-light and cool, high-light conditions, and there is a significant interaction between color temperature and brightness. CONCLUSION: EEGs might serve as a useful biological marker for further research related to the effects of polychromatic light on cognitive function.
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Idioma:
En
Revista:
Clinical Psychopharmacology and Neuroscience
Ano de publicação:
2013
Tipo de documento:
Article