Spatial Cognition of the Visually Handicapped on a Spiral Ramp kawahara

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We conducted a survey of a spiral ramp for the visually handicapped, attaching braille tiles on the ramp. It is found that the braille tiles are useful for cognition of circumference but not for that of direction. Constructing two braille tiles on the ramp every 1/4 round is the most suitable for the spatial cognition. Moreover, there is little tendency for the visually handicapped to try to deduce a direction from the number of the circumference, but they try to grasp a direction by sound, walking feeling, etc.