Hand skill and hand preference in blind and sighted children.

Congenitally blind and sighted blindfold children between the ages of 6 and 15 years were compared with each other for hand preferences and hand ability. All the children performed a 20-item hand preference test and every child performed three hand ability tasks: a sorting task, a finger dexterity task, and the Minnesota rate of manipulation task, each separately with the left and the right hand. Results indicated no differences between the hand preferences of the two groups. The sighted children were faster than the blind children on some of the hand ability tasks. There were no differences between the left and right hands for any of the tasks for either group. Results indicate an equipotentiality between the hands and suggest the possibility of training both hands during development on tasks that require tactile ability.