Discrete-Trial Motor Learning: Influence of Practice on Individual Differences and Intra-Individual Variability

Abstract

300 college males were tested on a discrete-trial motor-learning task (the peg turn) to examine the effects of practice under massing and distribution of practice upon individual differences and intra-individual variability. Massed and distributed practice did not have differential effects on these sources of variability. With practice, individual differences decreased early and then remained unchanged while intra-individual variability was substantially unchanged.