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J Child Lang. 2009 Sep;36(4):909-22. doi: 10.1017/S030500090800929X. Epub 2009 Feb 23.

Age-related changes in acoustic modifications of Mandarin maternal speech to preverbal infants and five-year-old children: a longitudinal study.

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1
Department of Special Education, National Taiwan Normal University, Tiawan. liumei@ntnu.edu.tw

Abstract

ABSTRACTAcoustic-phonetic exaggeration of infant-directed speech (IDS) is well documented, but few studies address whether these features are modified with a child's age. Mandarin-speaking mothers were recorded while addressing an adult and their child at two ages (0 ; 7-1 ; 0 and 5 ; 0) to examine the acoustic-phonetic differences between IDS and child-directed speech (CDS). CDS exhibits an exaggeration pattern resembling that of IDS - expanded vowel space, longer vowels, higher pitch and greater lexical tone differences - when compared to ADS. Longitudinal analysis demonstrated that the extent of acoustic exaggeration is significantly smaller in CDS than in IDS. Age-related changes in maternal speech provide some support for the hypothesis that mothers adjust their speech directed toward children as a function of the child's language ability.

PMID:
19232142
PMCID:
PMC2818882
DOI:
10.1017/S030500090800929X
[Indexed for MEDLINE]
Free PMC Article
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