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Successful word recognition by 10-month-olds given continuous speech both at initial exposure and test
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Predictive Brain Signals of Linguistic Development
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Abstract:
The ability to extract word forms from continuous speech is a prerequisite for constructing a vocabulary and emerges in the first year of life. Electrophysiological (ERP) studies of speech segmentation by 9- to 12-month-old listeners in several languages have found a left-localized negativity linked to word onset as a marker of word detection. We report an ERP study showing significant evidence of speech segmentation in Dutch-learning 7-month-olds. In contrast to the left-localized negative effect reported with older infants, the observed overall mean effect had a positive polarity. Inspection of individual results revealed two participant sub-groups: a majority showing a positive-going response, and a minority showing the left negativity observed in older age groups. We retested participants at age three, on vocabulary comprehension and word and sentence production. On every test, children who at 7 months had shown the negativity associated with segmentation of words from speech outperformed those who had produced positive-going brain responses to the same input. The earlier that infants show the left-localized brain responses typically indicating detection of words in speech, the better their early childhood language skills.
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Keyword:
Psychology
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URL: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3567457 http://www.ncbi.nlm.nih.gov/pubmed/23404161 https://doi.org/10.3389/fpsyg.2013.00025
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Rapid recognition at 10 months as a predictor of language development
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Brain potentials for word segmentation at seven months predict later language development
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Ability to segment words from speech as a precursor of later language development : insights from electrophysiological responses in the infant brain
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