Sleep-driven computations in speech processing

Frost, Rebecca Louise Ann and Monaghan, Padraic John (2017) Sleep-driven computations in speech processing. PLoS ONE, 12 (1). ISSN 1932-6203

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Abstract

Acquiring language requires segmenting speech into individual words, and abstracting over those words to discover grammatical structure. However, these tasks can be conflicting—on the one hand requiring memorisation of precise sequences that occur in speech, and on the other requiring a flexible reconstruction of these sequences to determine the grammar. Here, we examine whether speech segmentation and generalisation of grammar can occur simultaneously—with the conflicting requirements for these tasks being over-come by sleep-related consolidation. After exposure to an artificial language comprising words containing non-adjacent dependencies, participants underwent periods of consolidation involving either sleep or wake. Participants who slept before testing demonstrated a sustained boost to word learning and a short-term improvement to grammatical generalisation of the non-adjacencies, with improvements after sleep outweighing gains seen after an equal period of wake. Thus, we propose that sleep may facilitate processing for these conflicting tasks in language acquisition, but with enhanced benefits for speech segmentation.

Item Type:
Journal Article
Journal or Publication Title:
PLoS ONE
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2700
Subjects:
ID Code:
83811
Deposited By:
Deposited On:
03 Jan 2017 11:30
Refereed?:
Yes
Published?:
Published
Last Modified:
30 Sep 2020 06:40