Seasonal Variation in Bright Daylight Exposure, Mood and Behavior among a Group of Office Workers in Sweden

Journal of Circadian Rhythms

卷:16

Takeshi Morita¹  Mathias Adamsson²  Thorbjörn Laike³ 

[1] Fukuoka Women's University;

[2] Jönköping University, School of Engineering;

[3] Lund University;

关键词: Light exposure;    Psychological wellbeing;    Lighting conditions;    Circannual;    Sleep-wake behavior;    High latitude;   

DOI  :  10.5334/jcr.153

来源: DOAJ

【 摘 要 】

The purpose of the study was to investigate seasonal variation in mood and behavior among a group of office workers in Sweden (56°N). Thirty subjects participated in this longitudinal study. The subjects kept a weekly log that included questionnaires for ratings of psychological wellbeing and daily sleep-activity diaries where they also noted time spent outdoors. The lighting conditions in the offices were subjectively evaluated during one day, five times over the year. There was a seasonal variation in positive affect and in sleep-activity behavior. Across the year, there was a large variation in the total time spent outdoors in daylight. The subjects reported seasonal variation concerning the pleasantness, variation and strength of the light in the offices and regarding the visibility in the rooms. Finally, the subjects spent most of their time indoors, relying on artificial lighting, which demonstrates the importance of the lighting quality in indoor environments.

【 授权许可】

Unknown