Effects of practice on final position reproduction.

Effects of practice on final position reproduction.
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练习对最终位置再现的影响。

DOI:
10.1007/bf00230021
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发表时间:
1992
影响因子:
2
通讯作者:
Latash,ML
Latash,ML
中科院分区:
医学4区
文献类型:
--
作者:
Jaric,S;Corcos,DM;Latash,ML

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三名受试者练习快速、准确的36°屈肘运动,达到2.5°的目标,共进行了14次100次试验(共1400次试验)。然后,受试者返回进行第15次实验,他们被要求在与练习条件相同的条件下进行15个动作。然后在没有视觉反馈的三种实验条件下进行测试:(1)与练习条件相同,(2)开始位置有微小的移动(练习开始位置的±3°),不足以进行主观辨别,因此指示被试重复练习的动作;(3)在移动到同一目标的指令下,开始位置有较大的移动(练习开始位置的±15°)。实验条件2和3表明,起始位置的移动与最终位置的移动部分相关。这些结果是从运动控制的平衡点假说的角度来解释的。
Three subjects practiced fast, accurate 36° elbow flexion movements to a 2.5° target for 14 sessions of 100 trials (total, 1400 trials). Subjects then returned for a 15th experimental session in which they were asked to perform 15 movements under identical conditions to the practice condition. They were then tested under three experimental conditions without visual feedback: (1) identical to the practice conditions, (2) with small shifts in starting position (± 3° of the practiced starting position), that were insufficient for subjective discrimination and, therefore, subjects were instructed to repeat the practiced movements; and (3) with a large shift in starting position (range, ± 15° of the practiced starting position), under the instruction to move to the same target. Experimental conditions 2 and 3 demonstrated that shifts in starting position were partially correlated with shifts in final position. These results are interpreted from the point of view of the equilibrium-point hypothesis of motor control.
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