Tactile maps are an important wayfinding aid for people with visual impairments. To use a map effectively it is essential to judge and reproduce the locations of tactile maps. So the purpose of this study is to investigate the ability to judge and reproduce a location information between sighted and visually impaired undergraduates.
There were thirty participants in experiment: seven undergraduates who were blind, three who had some residual vision and twenty who were normal sighted. Participants were tested for their ability to explore and reproduce a layout of tactile symbols. in the first experiment, participants explored layouts of one, three or four shapes which the then attempted to reproduce. and than in an aligned condition participants reproduced the array from the same position at which they had explored ti. in the second experiment, participants were asked to move 90 degree around the experiment table between exploring and reproducing the layout.
The findings of this study confirmed that visual impaired participants generally were less accurate on all the tasks than the sighted. In the further analysis of visual impaired participants, the effect of number of shapes showed that accuracy decreased as the number of shapes increased. But the effect of alignment revealed no difference between the 90 degree rotated condition and the aligned condition.