Journal
DEVELOPMENTAL SCIENCE
Volume 11, Issue 3, Pages F9-F16Publisher
WILEY
DOI: 10.1111/j.1467-7687.2008.00671.x
Keywords
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Funding
- NICHD NIH HHS [HD 42235, R01 HD042235, R01 HD042235-04] Funding Source: Medline
- NIDCD NIH HHS [DC 008838, R01 DC008838-01, R01 DC008838] Funding Source: Medline
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The nature of predictive relations between early language and later cognitive function is a fundamental question in research on human cognition. In a longitudinal study assessing speed of language processing in infancy, Fernald, Perfors and Marchman (2006) found that reaction time at 25 months was strongly related to lexical and grammatical development over the second year. In this follow-up study, children originally tested as infants were assessed at 8 years on standardized tests of language, cognition, and working memory. Speed of spoken word recognition and vocabulary size at 25 months each accounted for unique variance in linguistic and cognitive skills at 8 years, effects that were attributable to strong relations between both infancy measures and working memory. These findings suggest that processing speed and early language skills are fundamental to intellectual functioning, and that language development is guided by learning and representational principles shared across cognitive and linguistic domains.
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