Handa Atul, Rhee Joohyun, Wright David L
a Human Performance Laboratories, Department of Kinesiology , Texas A&M University , College Station.
J Mot Behav. 2016;48(1):47-56. doi: 10.1080/00222895.2015.1035431. Epub 2015 May 28.
Robust offline gains occur during explicit motor sequence learning. However practice of a motor sequence, other than the target sequence, within 4-6 hr after initial practice interferes with these gains. This work assessed if experiencing supplemental practice of spatially or motorically similar sequences influenced the extent of offline gain. A contemporary model of sequence learning assumes that exposure to a spatially but not motor-related sequence would not compromise stabilization of the memory for the target sequence, thus, would have minimal impact on the resultant offline gain and possibly amplify overnight gains. As anticipated, a reliable offline improvement was observed for the target motor sequence in the absence of practice with an alternative motor sequence. This gain was significantly reduced when the learner experienced additional practice with either a novel or motorically similar sequence. There was no evidence of heightened overnight gain for the target sequence from intervening practice with a spatially similar sequence. Thus, the expression of offline improvement is not necessarily eliminated if practice of an alternative motor sequence is encountered shortly after a target sequence. However, the structure of the motor sequence faced during intervening practice can impact the resultant postpractice consolidation processes reflected in the eventual expression of offline facilitation.
在明确的运动序列学习过程中会出现显著的离线收益。然而，在初次练习后的4至6小时内，练习除目标序列之外的其他运动序列会干扰这些收益。这项研究评估了经历空间或运动相似序列的补充练习是否会影响离线收益的程度。一种当代的序列学习模型假设，接触空间但与运动无关的序列不会损害目标序列记忆的稳定，因此，对由此产生的离线收益影响最小，并且可能会增强夜间收益。正如预期的那样，在没有练习替代运动序列的情况下，观察到目标运动序列有可靠的离线改善。当学习者经历了与新的或运动相似的序列的额外练习时，这种收益显著降低。没有证据表明通过与空间相似序列的干预练习，目标序列的夜间收益会增加。因此，如果在目标序列之后不久遇到替代运动序列的练习，离线改善的表现不一定会消除。然而，干预练习期间所面对的运动序列结构会影响最终离线促进表现中所反映的练习后巩固过程。
