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Successful word recognition by 10-month-olds given continuous speech both at initial exposure and test
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Rapid recognition at 10 months as a predictor of language development
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Electrophysiological evidence of early word learning
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Abstract:
Around their first birthday infants begin to talk, yet they comprehend words long before. This study investigated the event-related potentials (ERP) responses of nine-month-olds on basic level picture-word pairings. After a familiarization phase of six picture-word pairings per semantic category, comprehension for novel exemplars was tested in a picture-word matching paradigm. ERPs time-locked to pictures elicited a modulation of the Negative Central (Nc) component, associated with visual attention and recognition. It was attenuated by category repetition as well as by the type-token ratio of picture context. ERPs time-locked to words in the training phase became more negative with repetition (N300-600), but there was no influence of picture type-token ratio, suggesting that infants have identified the concept of each picture before a word was presented. Results from the test phase provided clear support that infants integrated word meanings with (novel) picture context. Here, infants showed different ERP responses for words that did or did not align with the picture context: a phonological mismatch (N200) and a semantic mismatch (N400). Together, results were informative of visual categorization, word recognition and word-to-world-mappings, all three crucial processes for vocabulary construction.
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Keyword:
200404 - Laboratory Phonetics and Speech Science; 970120 - Expanding Knowledge in Languages; Communication and Culture; electrophysiology; infants; word recognition
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URL: https://doi.org/10.1016/j.neuropsychologia.2012.10.012
http://handle.uws.edu.au:8081/1959.7/520701
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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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