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Time- but not sleep-dependent consolidation promotes the emergence of cross-modal conceptual representations
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Abstract:
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.
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Article
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URL: https://doi.org/10.1016/j.neuropsychologia.2014.08.021 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4410790/ http://www.ncbi.nlm.nih.gov/pubmed/25174663
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The anterior temporal lobes are critically involved in acquiring new conceptual knowledge: Evidence for impaired feature integration in semantic dementia☆
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Capturing multidimensionality in stroke aphasia: mapping principal behavioural components to neural structures
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Time- but not sleep-dependent consolidation promotes the emergence of cross-modal conceptual representations
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Time- but not sleep-dependent consolidation promotes the emergence of cross-modal conceptual representations
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BASE
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Capturing multidimensionality in stroke aphasia: mapping principal behavioural components to neural structures
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The anterior temporal lobes support residual comprehension in Wernicke’s aphasia
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Going beyond inferior prefrontal involvement in semantic control: Evidence for the additional contribution of dorsal angular gyrus and posterior middle temporal cortex
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