Changes in Infant Directed Speech in the First Six Months

Autor/inn/en	Englund, Kjellrun; Behne, Dawn
Titel	Changes in Infant Directed Speech in the First Six Months
Quelle	In: Infant and Child Development, 15 (2006) 2, S.139-160 (22 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1522-7219
DOI	10.1002/icd.445
Schlagwörter	Phonetics; Vowels; Interpersonal Communication; Parent Child Relationship; Longitudinal Studies; Acoustics; Age Differences; Child Development; Speech Communication; Mothers; Foreign Countries; Norway + Suchen Sie Ihr Suchwort? Phonetik; Fonetik; Interpersonale Kommunikation; Parents-child relationship; Parent-child-relation; Parent-child relationship; Eltern-Kind-Beziehung; Longitudinal study; Longitudinal method; Longitudinal methods; Längsschnittuntersuchung; Akustik; Age; Difference; Age difference; Altersunterschied; Kindesentwicklung; Mother; Mutter; Ausland; Norwegen
Abstract	The Mother-Infant Phonetic Interaction model (MIPhI) predicts that, compared with adult directed speech (ADS), in infant directed speech (IDS) vowels will be overspecified and consonants underspecified during the infants' first 6 months. In a longitudinal natural study, six mothers' ADS and IDS were recorded on 10 occasions during the first 6 months after their infants were born. Acoustic-phonetic measures, including the first two formant frequencies and duration for vowels and the duration of the fricative /s/, were used to test the MIPhI model with differences between IDS and ADS during the infants' first 6 months. Repeated measures analyses showed the fricative /s/ duration was stably longer in IDS, corresponding to an overspecification throughout the 6 months. The unexpected smaller vowel space for IDS than ADS was stably maintained over the six months, suggesting an underspecification of vowels. Vowel duration, which was generally longer in IDS than ADS, however, changed over time, decreasing in difference between IDS and ADS during month 3 and 4. Results invite adjustments to the MIPhI model, in particular related to infants' needs for perceptual enhancement of speech segments, and to the course of infant neurological and communicative development throughout the first 6 months. (Contains 4 figures, 4 tables and 1 note.) (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10