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Sagawa, K., Shinohara, M., Doi, K., Fujimoto, H.
Aging effects on tactile discrimination of figural representations
in tactile guide maps.
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Keywords: tactile perception, tactile sense, aging effects, pressure sense,
spatial resolution, pictorial discrimination, texture discrimination
To obtain design-relevant information for tactile guide maps, aging effects of
tactile perception was investigated experimentally with regards to: (1)
fundamental tactile properties of pressure sense and spatial resolution, (2)
pictorial discrimination for a set of limited number of simple patterns with
different size, line width, and raised height, and (3) texture discrimination
for surfaces with raised small dots of different density. About 50 older and
50 younger subjects were participated in these tactile ability tests. The
results showed that in each experiment aging effect was clearly observed
showing that abilities of spatial form and texture discrimination were much
decreased for older people compared to the younger. This indicated
practically that larger pictorial size or spatial separation would be required
for older people in designing tactile guide maps or tactile markings for their
better recognition.
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