Time- but not sleep-dependent consolidation promotes the emergence of cross-modal conceptual representations.
Time- but not sleep-dependent consolidation promotes the emergence of cross-modal conceptual representations.
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DOI：
10.1016/j.neuropsychologia.2014.08.021
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发表时间：
2014-10
期刊：
影响因子：
2.6
通讯作者：
Ralph, Matthew A. Lambon
中科院分区：
文献类型：
--
作者：
Hennies, Nora;Lewis, Penelope A.;Durrant, Simon J.;Cousins, James N.;Ralph, Matthew A. Lambon
关于对象的概念性知识包括一组不同的多模式和概括性信息，这些信息使我们能够为环境中的刺激带来意义。概念表征的形成需要两个关键的计算挑战：整合来自不同感觉模式的信息和提取样本之间的统计规律。尽管这些过程被认为是通过离线记忆巩固来促进的，但关于跨模式概念如何随着时间的推移而不是随着类别的持续暴露而在线下演变的研究仍然缺乏。在这里，我们的目标是通过将这一过程减少到两个关键的计算挑战并探索其在离线保留期内的演变来模拟新概念表征的形成。参与者学会了基于简单的一维视觉规则来区分两个抽象类别的成员。这项任务背后是一个更复杂的类别结构隐藏指标，这需要整合两种感觉模式的信息。在两个实验中，我们调查了依赖时间和睡眠的巩固对类别学习的影响。我们的结果表明，离线记忆巩固促进了跨通道类别学习。令人惊讶的是，清醒时的巩固，但不是睡眠时的巩固显示了这种有益的效果。通过论证离线整合的重要性，目前的研究为形成概念表征的过程提供了进一步的见解。我们研究概念表示是如何脱机发展的。我们使用抽象的、跨通道的类别学习任务来模仿概念的形成。跨尾流的24小时巩固和12小时巩固促进了跨模式类别学习。跨睡眠的12小时巩固没有任何有益的影响。
Conceptual knowledge about objects comprises a diverse set of multi-modal and generalisable information, which allows us to bring meaning to the stimuli in our environment. The formation of conceptual representations requires two key computational challenges: integrating information from different sensory modalities and abstracting statistical regularities across exemplars. Although these processes are thought to be facilitated by offline memory consolidation, investigations into how cross-modal concepts evolve offline, over time, rather than with continuous category exposure are still missing. Here, we aimed to mimic the formation of new conceptual representations by reducing this process to its two key computational challenges and exploring its evolution over an offline retention period. Participants learned to distinguish between members of two abstract categories based on a simple one-dimensional visual rule. Underlying the task was a more complex hidden indicator of category structure, which required the integration of information across two sensory modalities. In two experiments we investigated the impact of time- and sleep-dependent consolidation on category learning. Our results show that offline memory consolidation facilitated cross-modal category learning. Surprisingly, consolidation across wake, but not across sleep showed this beneficial effect. By demonstrating the importance of offline consolidation the current study provided further insights into the processes that underlie the formation of conceptual representations. We examine how conceptual representations evolve offline. We use an abstract, cross-modal category learning task to mimic concept formation. 24h consolidation and 12h consolidation across wake facilitate cross-modal category learning. 12h consolidation across sleep has no beneficial effect.
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DOI：
10.1098/rstb.2012.0392
发表时间：
2014
期刊：
Philosophical transactions of the Royal Society of London. Series B, Biological sciences
影响因子：
--
作者：
Lambon Ralph MA
通讯作者：
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影响因子：
16.2
作者：
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DOI：
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发表时间：
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期刊：
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影响因子：
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通讯作者：
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影响因子：
16.2
作者：
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通讯作者：
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影响因子：
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作者：
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