There are instructive paradoxes about touch and vision. Blind people who are
totally without visual experience can be excellent chess players. Yet spatial
problems present a major difficulty for congenitally, totally blind young children.
Even more intriguing, perceptual illusions, typically regarded as optic phenomena,
also occur in touch. My talk will centre on some of the underlying factors and
the practical implications they have for getting and remembering useful spatial
information from tactile maps and 'table-top' displays by touch and movement.
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