Resting States and Memory Consolidation: A Preregistered Replication and Meta-Analysis
Resting States and Memory Consolidation: A Preregistered Replication and Meta-Analysis
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DOI：
10.1038/s41598-019-56033-6
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发表时间：
2019-12-18
影响因子：
4.6
通讯作者：
Wamsley, Erin J.
中科院分区：
文献类型：
--
作者：
Humiston, Graelyn B.;Tucker, Matthew A.;Wamsley, Erin J.
虽然最近的几项研究发现，编码后的安静，闭上眼睛的清醒休息时间有利于记忆巩固，但其他人则报告无效。为了更精确地估计这种效果，我们对我们实验室最近的一项研究进行了准精确的行为复制，该研究发现，训练后闭眼清醒休息相对于分心任务改善了陈述性记忆。与我们的假设相反，观察到的效果并不显著;然而，它确实落在我们先前发现的95%置信区间内。此外，总结n = 10项类似研究的荟萃分析结果表明，清醒休息对非文字记忆有中等程度的显著益处（d = 0.38，p < 0.001）。我们认为，这篇文献中明显相互矛盾的结果可以用抽样和/或测量误差造成的变异性来解释，在一组研究中，往往没有足够的能力来检测比预期更小的休息效果。此外，探索性分析显示，特质白日梦频率增加与闭眼休息时的记忆保持呈负相关。结合我们的复制和元分析，这些研究表明，清醒时的休息对记忆巩固有一个很小但很重要的好处，而这个好处需要大脑从外部任务或自发思维中解放出来。
While several recent studies have found that a post-encoding period of quiet, eyes-closed waking rest benefits memory consolidation, others have reported null effects. To more precisely estimate this effect, we conducted a quasi-exact behavioural replication of a recent study from our lab, which found that post-training eyes-closed waking rest improved declarative memory relative to a distractor task. Contrary to our hypothesis, the observed effect was not significant; however, it did fall within the 95% confidence interval of our previous finding. Furthermore, a meta-analytic effect summarizing n = 10 similar studies indicates a moderately sized and significant benefit of waking rest for verbal memory (d = 0.38, p < 0.001). We argue that the apparently conflicting results in this literature are most parsimoniously explained by variability due to sampling and/or measurement error, in a group of studies often underpowered to detect a smaller-than-expected effect of rest. Additionally, exploratory analyses revealed that increased trait daydreaming frequency negatively correlated with memory retention during eyes-closed rest. Together with our replication and meta-analysis, these studies suggest that waking rest confers a small but significant benefit on memory consolidation, and that this benefit requires the mind to be free from attention to either external tasks or spontaneous thought.