The effect of sleep on novel word learning in healthy adults: A systematic review and meta-analysis
- 21 September 2021
- journal article
- review article
- Published by Springer Science and Business Media LLC in Psychonomic Bulletin & Review
- Vol. 28 (6), 1811-1838
- https://doi.org/10.3758/s13423-021-01980-3
Abstract
There is increasing evidence to indicate that sleep plays a role in language acquisition and consolidation; however, there has been substantial variability in methodological approaches used to examine this phenomenon. This systematic review and meta-analysis aimed to investigate the effect of sleep on novel word learning in adults, and explore whether these effects differed by retrieval domain (i.e., recall, recognition, and tests of lexical integration). Twenty-five unique studies met the inclusion criteria for the review, and 42 separate outcome measures were synthesized in the meta-analysis (k = 29 separate between-group comparisons, n = 1,396 participants). The results from the omnibus meta-analysis indicated that sleep was beneficial for novel word learning compared with wakefulness (g = 0.50). Effect sizes differed across the separate domain-specific meta-analyses, with moderate effects for recall (g = 0.57) and recognition memory (g = 0.52), and a small effect for tasks which measured lexical integration (g = 0.39). Overall, the results of this meta-analysis indicate that sleep generally benefits novel word acquisition and consolidation compared with wakefulness across differing retrieval domains. This systematic review highlights the potential for sleep to be used to improve second-language learning in healthy adults, and overall provides further insight into methods to facilitate language development.This publication has 80 references indexed in Scilit:
- Rapid neocortical acquisition of long-term arbitrary associations independent of the hippocampusProceedings of the National Academy of Sciences of the United States of America, 2011
- Sleep Spindle Activity is Associated with the Integration of New Memories and Existing KnowledgeJournal of Neuroscience, 2010
- A meta-analysis of the impact of short-term sleep deprivation on cognitive variables.Psychological Bulletin, 2010
- A complementary systems account of word learning: neural and behavioural evidencePhilosophical Transactions B, 2009
- Learning and Consolidation of Novel Spoken WordsJournal of Cognitive Neuroscience, 2009
- The Sleeping Brain's Influence on Verbal Memory: Boosting Resistance to InterferencePLOS ONE, 2009
- Lexical configuration and lexical engagement: When adults learn new wordsCognitive Psychology, 2007
- Recognition memory and the medial temporal lobe: a new perspectiveNature Reviews Neuroscience, 2007
- Measuring inconsistency in meta-analysesBMJ, 2003