Abstract
In order to clarify the psychological effects of luminance distribution, the authors of this study built a model office which could be subjected to many kinds of variation in average luminance and in the luminance ratios of ceiling, walls, and floor : and we evaluated subjects impressions of this model. As a result, we found that the psychological effects of these experimental variables differed according to which of the lighting installations (general or task-ambient) was adopted. At the same time, when we observed the amounts of luminance variation produced by individual stimuli, we found that correlation exists between the average level of luminance and the amounts of luminance variation. Consequent examination of amounts of luminance variation suggested that the psychological effect of luminance distribution is closely related with the balance of luminance variations detectable at varying degrees of fineness.
