A subjective experiment was conducted to provide the evidences regarding the mechanism of the effect of indoor environmental quality on productivity by objective evaluation approach. The climate chamber was conditioned at the operative temperatures of 25.5, 28.5 or 31.5° C to examine the relationships among indoor thermal environment, performance and mental workload. The change rate of total hemoglobin concentration (ΔtotalHb) was measured on the left forehead by near infrared spectroscopy as an index of mental workload. Triple-digit multiplication task was assigned at two levels of working speed; maximum and normal pace, to manipulate mental workload. The Δtotal Hb at maximum pace was higher than that at normal pace at both 28.5° C and 31.5° C. The difference of ΔtotalHb between maximum and normal pace were significantly higher at 31.5° C than that at 25.5° C and tended to be higher at 28.5° C than that at 25.5° C. The results suggested that the mental workload level to maintain their task performance with maximum effort was higher in hotter environment.
|出版ステータス||Published - 2009 12 1|
|イベント||9th International Healthy Buildings Conference and Exhibition, HB 2009 - Syracuse, NY, United States|
継続期間: 2009 9 13 → 2009 9 17
|Conference||9th International Healthy Buildings Conference and Exhibition, HB 2009|
|Period||09/9/13 → 09/9/17|
ASJC Scopus subject areas