Abstract
The purpose of this study is to examine the interaction between the speed and accuracy of information processing and the characteristics of the motor tasks. Three tasks for motor learning were employed : task 1) adjusting the intensity of static muscle contraction (40%-IMEG), task 2) adjusting the intensity of grasping power (40%-MVC), task 3) positioning task (Elbow joint). In the learning session, following a short period of movement, the extrinsic KR (Knowledge of Results) was provided, and before the next trial, subjects had a rest. The interval between the start of providing extrinsic KR and the next trial (post-KR delay) was varied as between subjects factor. Post-KR delay is thought to be as the period during which subjects use KR to construct movement plans for the next trial. If the post-KR delay is too short, subjects will not have sufficient time for planning, and the learning will be prevented. From the results of this study, the minimum time needed for information processing for three tasks were : task 1) 2-4 sec, task 2) 1-2 sec, task 3) less than 1 sec. Thus it was suggested that speed and accuracy in motor information processing might be improved by the participation of the sensations for position change and superficial perceptions.
