Abstract
224 Ss practiced on the pursuit rotor with massed practice for 15 min. The four conditions of practice were arranged in a 2 × 2 factorial with initial hand practice (5 min., left or right) occurring with or without a 5-min. rest at the end of the fifth minute of practice. All groups finished with 10 min. of right-handed practice. Trial means, standard deviations, and correlations were analyzed for differences between bilateral and unilateral reminiscence. The unilateral reminiscence group showed a significantly greater mean gain after rest than the bilateral reminiscence group. Rest did not have the effect of reinstating the original individual differences. For trials spanning rest, r dropped more for unilateral than for bilateral reminiscence groups. It was concluded that bilateral and unilateral reminiscence were best measured by changes in the mean time on target and not by changes in measures of variance.