Electrophysiological evidence of early word learning

► We investigated ERP responses of 9-month-olds on basic level picture-word pairings. ► With six pairings per concept, repetition of concepts leads to smaller Negative Central components. ► Infants have identified pictures within a second. ► Within 250 ms, infants noticed when the word does not match a picture. ► Size of congruency effect (N400) correlates with infants' vocabulary.