NDLI: Infants Discriminate Voicing and Place of Articulation With Reduced Spectral and Temporal Modulation Cues.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Cabrera, Laurianne Lorenzi, Christian Bertoncini, Josiane
Abstract	PURPOSE: This study assessed the role of spectro-temporal modulation cues in the discrimination of 2 phonetic contrasts (voicing and place) for young infants. METHOD: A visual-habituation procedure was used to assess the ability of French-learning 6-month-old infants with normal hearing to discriminate voiced versus unvoiced (/aba/-/apa/) and labial versus dental (/aba/-/ada/) stop consonants. The stimuli were processed by tone-excited vocoders to degrade frequency-modulation cues while preserving: (a) amplitude-modulation (AM) cues within 32 analysis frequency bands, (b) slow AM cues only (<16 Hz) within 32 bands, and (c) AM cues within 8 bands. RESULTS: Infants exhibited discrimination responses for both phonetic contrasts in each processing condition. However, when fast AM cues were degraded, infants required a longer exposure to vocoded stimuli to reach the habituation criterion. CONCLUSIONS: Altogether, these results indicate that the processing of modulation cues conveying phonetic information on voicing and place is 'functional' at 6 months. The data also suggest that the perceptual weight of fast AM speech cues may change during development.
File Format	HTM / HTML
ISSN	10924388
Issue Number	3
Journal	Journal of Speech Language and Hearing Research
Volume Number	58
e-ISSN	15589102
Language	English
Publisher	American Speech-Language-Hearing Association
Publisher Date	2015-06-01
Publisher Place	United States
Access Restriction	Subscribed
Subject Keyword	Discipline Audiology
Content Type	Text
Resource Type	Article
Subject	Medicine Speech and Hearing Linguistics and Language

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