Stress Reduction of Physiological Arousal through Short-term Dynamic Lighting under Different Task Loads.

Abstract

The aim of this study was to investigate the stress-relief effect of dynamic lighting under different task loads. Two dynamic lighting conditions were designed, transitioning over 10 minutes from 500 lux to 200 lux and 100 lux, respectively. Two levels of task loads were implemented. The high-load task consisted of a 20-minute word recognition test, while the low-load task involved a 5-minute oral response task. Three types of physiological signals were assessed as measurement indices: Skin Conductance Level, Skin Temperature, and Heart Pulse.

The results indicate that dynamic lighting can alleviate physiological stress. Regarding its effects on different physiological signals, SCL showed no significant differences between the two task loads and lighting conditions. However, SKT and Pulse exhibited significant differences. In conclusion, as the previous task load increased, the subsequent effect of dynamic lighting occurred more quickly.