Khan Michael A, Sarteep Salah, Mottram Thomas M, Lawrence Gavin P, Adam Jos J
School of Sport, Health and Exercise Sciences, Bangor University, UK.
Acta Psychol (Amst). 2011 Mar;136(3):425-31. doi: 10.1016/j.actpsy.2011.01.010. Epub 2011 Feb 21.
Previous research has demonstrated that movement times to the first target in sequential aiming movements are influenced by the properties of subsequent segments. Based on this finding, it has been proposed that individual segments are not controlled independently. The purpose of the current study was to investigate the role of visual feedback in the interaction between movement segments. In contrast to past research in which participants were instructed to minimize movement time, participants were set a criterion movement time and the resulting errors and limb trajectory kinematics were examined under vision and no vision conditions. Similar to single target movements, the results indicated that vision was used within each movement segment to correct errors in the limb trajectory. In mediating the transition between segments, visual feedback from the first movement segment was used to adjust the parameters of the second segment. Hence, increases in variability that occurred from the first to the second target in the no vision condition were curtailed when visual feedback was available. These results are discussed along the lines of the movement constraint and movement integration hypotheses.
先前的研究表明，在连续瞄准运动中，到达第一个目标的运动时间受后续节段特性的影响。基于这一发现，有人提出各个节段并非独立控制。本研究的目的是调查视觉反馈在运动节段间相互作用中的作用。与过去要求参与者尽量缩短运动时间的研究不同，本研究给参与者设定了一个标准运动时间，并在有视觉和无视觉条件下检查由此产生的误差和肢体轨迹运动学。与单目标运动相似，结果表明，在每个运动节段内都利用视觉来纠正肢体轨迹中的误差。在调节节段间的过渡时，来自第一个运动节段的视觉反馈被用于调整第二个节段的参数。因此，当有视觉反馈时，无视觉条件下从第一个目标到第二个目标出现的变异性增加就会减少。将根据运动约束和运动整合假设对这些结果进行讨论。
