What is it about?
The study showed that 20-month-olds with high productive vocabularies evinced an N400 incongruity effect to violations of trained associations between novel words and pictures, whereas20-month-olds with low productive vocabularies did not. However, both high and low producers showed an N400 effect for common real words paired with an incongruous object.
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Why is it important?
The findings suggest that there may be substantial differences in receptive fast mapping efficiency between typically developing children who have reached a productive vocabulary spurt and typically developing children who have not yet reached this milestone.
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This page is a summary of: Productive Vocabulary Size Predicts Event-related Potential Correlates of Fast Mapping in 20-Month-Olds, Journal of Cognitive Neuroscience, July 2008, The MIT Press,
DOI: 10.1162/jocn.2008.20087.
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