Návrh psychofyziologické laboratoře a experimentů pro výzkum interakce člověk-světlo v kontextu dopravní bezpečnosti

Abstract

LED light sources have become an integral part of lighting elements in almost all spheres of human activity. Road traffic is no exception, where these light sources are integral parts of both headlamps and auxiliary lamps. Although the headlights are sources of white light, due to the technology used, they also emit a significant amount of light within the blue part of the visible spectrum. The amount of the blue component of light is the subject of many controversies and there is currently an absence of scientific consensus regarding photochemical, psychophysiological, and other possible effects of blue light on the human body. In the context of psychophysiological response, especially in glare situations in night road traffic, the author presents a design proposal for an appropriate laboratory environment and experiments executable within this laboratory in order to investigate the relationship between the subjective experience of glare perception and psychophysiological effects of glare-inducing light. For this purpose, both commercially available systems and instruments are used, as well as equipment of own design and production, which the author developed in cooperation with the appointed colleagues. Simultaneously, light samples are prepared, which allows experimental comparison of the effects of light with different properties, especially with regard to its color and sharpness of the low beam cut-off line. The presented work also includes the first results obtained within the proposed laboratory, which demonstrate in particular a large degree of inter-individual variability between participants in the experiments, showing also a relatively low correlation between measured psychophysiological signals (e.g. skin conductivity) and the de Boer scale commonly used in glare research.