Prolonged practice of a simple motor task by preferred and nonpreffered hands.

After prolonged practice (1300 10 sec. trials) the tapping speed of the nonpreferred hand reached that of the preferred hand on a simple finger-tapping task. Analysis of the intertrap intervals showed the variability of the duration of intertrap intervals was smaller for the preferred than for the nonpreferred hand, the difference was not affected by the prolonged practice for N = 1.