Abstract
Psychological and physiological effects of colored lights for change of flashing cycle were examined using aliquid crystal display in a dark environment (<0.1lx). The colored lights were characterized with various flashing cycle, i.e., flashing cycle were selected the range of 1.2-4.2 s. To investigate psychological and physiological effects, we used electroencephalography, heart rate and a simple questionnaire. Subjective evaluations of 'comfort', 'relaxation', 'awakening', 'tension', and 'anxiety' were conducted using a five-level psychological preferences evaluation. Electroencephalographic, heart rate and psychological evaluations revealed that the slower flashing cycle had a good effect for relaxation. Colored lights with the earlier flashing cycle enhanced the degrees of tension and anxiety. Results of this study are effective for providing healing environment to patients with severe stress.
