Visuo-motor skill and visual perception in left and right handed children of superior intelligence.

It was thought possible that the proximity of the right parietal cortex to the leading hand area in left handed subjects may confer an advantage in tasks requiring visuo-motor function. However, the study showed the left handed group to be defective in the performance of the Wechsler Block-design Sub-test. As some mature left handed individuals may excel in tasks requiring refined visuo-motor skill, it is suggested that any constitutional deficiency is not fixed, but may be expected to disappear with increased maturity, or as the result of training.