Interference-free acquisition of overlapping sequences in explicit spatial memory
Interference-free acquisition of overlapping sequences in explicit spatial memory
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DOI：
10.1016/j.bbr.2013.12.047
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发表时间：
2014-04-01
影响因子：
2.7
通讯作者：
Straube, Andreas
中科院分区：
文献类型：
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作者：
Eggert, Thomas;Dreyer, Johannes;Straube, Andreas
某些类型的人类顺序记忆，例如由训练有素的音乐家获得的新作品，似乎在延长记忆序列的长度和在新获得的顺序上下文中灵活地重用已知子序列方面非常有效。这意味着即使在学习已知序列的部分突变序列时，也可以避免已知子序列和新获得的子序列之间的干扰。众所周知，已建立的运动序列不具有这种灵活性。本研究利用延迟模仿的学习，通过量化连续获得的部分重叠序列之间的干扰来研究外显空间记忆的灵活性。在第1天学习了一个空间序列后，在第2天逐步修改该序列。第3天，分别用初始序列和修改后的序列进行保留试验。结果显示，受试者在第1天和第2天的表现非常好。在复制序列的逐步修改过程中，没有观察到变化目标和未变化目标之间的空间干扰。令人惊讶的是，受试者在第三天的两组测试中都表现良好。与未进行中间突变训练的对照实验相比，第1天的初始训练没有主动干扰第3天修改序列的保留。反之亦然，第2天的突变训练不会对第3天测试的原始序列的保留产生追溯性干扰。结果强调了获取外显空间记忆的灵活性。(C) 2014 Elsevier B.V.版权所有
Some types of human sequential memory, e.g. the acquisition of a new composition by a trained musician, seem to be very efficient in extending the length of a memorized sequence and in flexible reuse of known subsequences in a newly acquired sequential context. This implies that interference between known and newly acquired subsequences can be avoided even when learning a sequence which is a partial mutation of a known sequence. It is known that established motor sequences do not have such flexibility.Using learning of deferred imitation, the current study investigates the flexibility of explicit spatial memory by quantifying the interferences between successively acquired, partially overlapping sequences. After learning a spatial sequence on day 1, this sequence was progressively modified on day 2. On day 3, a retention test was performed with both the initial and the modified sequence. The results show that subjects performed very well on day 1 and day 2. No spatial interference between changed and unchanged targets was observed during the stepwise progressive modification of the reproduced sequence. Surprisingly, subjects performed well on both sequences on day 3. Comparison with a control experiment without intermediate mutation training showed that the initial training on day 1 did not proactively interfere with the retention of the modified sequence on day 3. Vice versa, the mutation training on day 2 did not interfere retroactively with the retention of the original sequence as tested on day 3. The results underline the flexibility in acquiring explicit spatial memory. (C) 2014 Elsevier B.V. All rights reserved.