Final Syllable Lengthening (FSL) in infant vocalizations

Suneeti Nathani Iyer · D. Kimbrough Oller · Alan B. Cobo-Lewis

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Language Development and Disorders Phonetics and Phonology Research Hearing Impairment and Communication

Abstract

Final Syllable Lengthening (FSL) has been extensively examined in infant vocalizations in order to determine whether its basis is biological or learned. Findings suggest there may be a U-shaped developmental trajectory for FSL. The present study sought to verify this pattern and to determine whether vocal maturity and deafness influence FSL. Eight normally hearing infants, aged 0;3 to 1;0, and eight deaf infants, aged 0;8 to 4;0, were examined at three levels of prelinguistic vocal development: precanonical, canonical, and postcanonical. FSL was found at all three levels suggesting a biological basis for this phenomenon. Individual variability was, however, considerable. Reduction in the magnitude of FSL across the three sessions provided some support for a downward trend for FSL in infancy. Findings further indicated that auditory deprivation can significantly affect temporal aspects of infant speech production.

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References

1984Phonology and Syntax: The Relation between Sound and Structure 1976Linguistic uses of segmental duration in English: Acoustic and perceptual evidence 2000The Emergence of the Speech Capacity 1988The Role of Audition in Infant Babbling 1973The effect of position in utterance on speech segment duration in English 1972Rhythmic (hierarchical) versus serial structure in speech and other behavior.1966A COMPARISON OF SYLLABLE LENGTH CONDITIONING AMONG LANGUAGES 1975Speech rhythm: its relation to performance universals and articulatory timing

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