Kovacs Attila J, Boyle Jason, Grutmatcher Nicole, Shea Charles H
Texas A&M University, Department of Health and Kinesiology, TAMU 4243, College Station, TX 77845-4243, United States.
Acta Psychol (Amst). 2010 Feb;133(2):119-26. doi: 10.1016/j.actpsy.2009.10.007. Epub 2009 Nov 24.
Recent experiments have demonstrated that complex multi-element movement sequences were coded in visual-spatial coordinates even after extensive practice, while relatively simple spatial-temporal movement sequences are coded in motor coordinates after a single practice session. The purpose of the present experiment was to determine if the control process rather than the difficulty of the sequence played a role in determining the pattern of effector transfer. To accomplish this, different concurrent feedback conditions were provided to two groups of participants during practice of the same movement sequence. The results indicated that when concurrent visual feedback was provided during the production of the movement, which was thought to encourage on-line control, the participants performed transfer tests with the contra-lateral limb better when the visual-spatial coordinates were reinstated than when the motor coordinates were reinstated. When concurrent visual feedback was not provided, which was thought to encourage pre-planned control, the opposite was observed. The data are consistent with the hypothesis that the mode of control dictates the coordinate system used to code the movement sequence rather than sequence difficulty or stage of practice as has been proposed.
最近的实验表明，即使经过大量练习，复杂的多元素运动序列仍以视觉空间坐标进行编码，而相对简单的时空运动序列在单次练习后则以运动坐标进行编码。本实验的目的是确定在决定效应器转移模式时，起作用的是控制过程而非序列的难度。为实现这一点，在两组参与者练习相同运动序列的过程中，提供了不同的同步反馈条件。结果表明，在运动产生过程中提供同步视觉反馈时，这被认为会鼓励在线控制，当恢复视觉空间坐标时，参与者用对侧肢体进行转移测试的表现要优于恢复运动坐标时。当未提供同步视觉反馈时，这被认为会鼓励预先计划的控制，则观察到相反的情况。这些数据与以下假设一致，即控制模式决定了用于编码运动序列的坐标系，而非如之前所提出的序列难度或练习阶段。
