RIGHT‐AND LEFT‐HANDED COUNTING OF BRAILLE DOTS IN SUBJECTS UNACCUSTOMED TO BRAILLE

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Abstract
Previous work has shown that children acquainted with Braille can usually read better with their left than with their right hand. At least in right-handed people, the right cerebral hemisphere is dominant for counting dots. The comparative skill of right [R] and left [L] middle (M) and index (I) fingers in counting Braille dots are compared, in right-handed subjects unacquainted with Braille. In 1 experiment with 30 subjects no significant difference was found between LI and RI fingers. Another experiment failed to reveal any R/L differences although it detected a superiority of I over M fingers at P < 0.025. When the task was split between the 2 I fingers working simultaneously they performed significantly (P < 0.001) better than when working alone. This latter finding is thought to have a bearing on the failure to detect RL differences; other possible explanations of the findings are discussed.

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