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Abstract
Visuomotor adaptation to left-shifting prisms can affect performance for a variety
of tasks in neurologically intact (normal) participants. This study examined whether
visuomotor adaptation affects performance on the greyscales task in normal participants.
Forty-two normal participants completed a greyscales task before and after adaptation
to either: left-shifting prisms, right-shifting prisms or control spectacles that
did not shift the visual scene. Participants demonstrated a leftward bias (i.e., selected
the stimulus that was darker on the left as being darker overall) that was reversed
by a short period of visuomotor adaptation to left-shifting prisms. In contrast, this
bias was unaffected by adaptation to right-shifting prisms and control spectacles.
The findings demonstrate that a simple visuomotor task can alter the distribution
of spatial attention for the greyscales task in normal participants.