抄録
Steps are common features in our day-to-day living and working environment. Unfortunately, the occurrence of accidents on or around steps is thus inevitable. A failed visibility to see or recognize a step remains the most common attribute in these accidents. Surprisingly, appropriate methods for examining and quantifying step visibility have yet to be established. In this research, sensory scales of step visibility were created in order to examine the effects of two factors on step visibility in sensory testing methods; observation distance from step and observation action while viewing a step from the descending direction. Results of sensory and statistical tests revealed that step visibility tends to decline as observation distance increases, and the quality and tendency of step visibility in different observation conditions varies based on the unique and individual visual characteristics of each step.
