A comparison of static and dynamic forms of augmented feedback during the acquisition of rapid aiming movement

In this study two forms of augmented feedback were compared to examine their effects on the acquisition of a rapid aiming movement. One group received a static, graphic representation of their movement displacement as a function of time while another received a real-time, dynamic playback of their movement. The two groups did not differ significantly with respect to accuracy and movement time. However, on analysis of the kinematic data, the process of goal attainment differed between groups. Specifically, the Dynamic group tended to produce faster primary submovements and had more trials containing corrective secondary submovements than the Static group. Consequently the Dynamic group consumed a smaller proportion of the total movement time and distance in the primary submovement phase as compared to the Static group. These different strategies were evident in both immediate and delayed retention. It is argued that the dynamic feedback provides a richer source of afferent information which enables participants to form a stronger association (calibration) with visual information and the kinesthetic consequence of the movement.