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Acceptance of lexical overlap by monolingual and bilingual toddlers
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Sensitivity to amplitude envelope rise time in infancy and vocabulary development at three years : a significant relationship
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Infant-directed speech facilitates seven-month-old infants' cortical tracking of speech
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Constraints on tone sensitivity in novel word learning by monolingual and bilingual infants : tone properties are more influential than tone familiarity
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The development of fast‐mapping and novel word retention strategies in monolingual and bilingual infants
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The origins of babytalk : smiling, teaching or social convergence?
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The temporal modulation structure of infant-directed speech
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Abstract:
The temporal modulation structure of adult-directed speech (ADS) is thought to be encoded by neuronal oscillations in the auditory cortex that fluctuate at different temporal rates. Oscillatory activity is thought to phase-align to amplitude modulations in speech at corresponding rates, thereby supporting parsing of the signal into linguistically relevant units. The temporal modulation structure of infant-directed speech (IDS) is unexplored. Here we compare the amplitude modulation (AM) structure of IDS recorded from mothers speaking, over three occasions, to their 7-, 9-, and 11-month-old infants, and the same mothers speaking ADS. Analysis of the modulation spectrum in each case revealed that modulation energy in the theta band was significantly greater in ADS than in IDS, whereas in the delta band, modulation energy was significantly greater for IDS than ADS. Furthermore, phase alignment between delta- and theta-band AMs was stronger in IDS compared to ADS. This remained the case when IDS and ADS were rate-normalized to control for differences in speech rate. These data indicate stronger rhythmic synchronization and acoustic temporal regularity in IDS compared to ADS, structural acoustic differences that may be important for early language learning.
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Keyword:
language acquisition; speech perception in infants; XXXXXX - Unknown
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URL: https://doi.org/10.1162/OPMI_a_00008 http://handle.westernsydney.edu.au:8081/1959.7/uws:45186
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Is it a name or a fact? : disambiguation of reference via exclusivity and pragmatic reasoning
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OZI : Australian English communicative development inventory
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Novel word learning, reading difficulties, and phonological processing skills
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Mutual exclusivity develops as a consequence of abstract rather than particular vocabulary knowledge
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The effects of linguistic experience on the flexible use of mutual exclusivity in word learning
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