engleski

Decision-making time and precision of different speed movements

This study, which was carried out on nineteen subjects, 18-20 years of age, was aimed at assessment of the effects of movement velocity on various aspects of movement time and precision. The subject’s task was to execute lower arm movements of different amplitudes (20, 40, 60 and 80 degrees) at three different speeds, i. e. subject’s suboptimal, optimal and supraoptimal speed on a kinaesthesiometer. The tasks were carried out without visual control. The whole experiment was repeated under visual control, as well. The aim of this was to obtain the kinaesthetic information processing time (KIPT), which was defined as the difference between the movement time without visual control and movement time under visual control. The task time, decision-making time (time from the signal onset to the start of movement), as well as the error magnitude (deviation from the target) were recorded for each trial in milliseconds and degrees, respectively. As could be expected, the analysis of results showed significant effects of the movement velocity and the movement amplitude on total movement time for untrained and trained subjects. The decision-making time (DMT) showed no effects of the level of training or amplitudes, while KIPT increased as the amplitude increased. The velocity of movements, however, had significant effects on DMT and KIPT, which increased as the movement velocity decreased. As could be expected, the level of training, as well as the movement velocity significantly affected movement precision. The smallest error was obtained for the optimal speed movements, rather than slow movements, as it might have been expected.

movement programme; movement precision; movement velocity;

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