Phonetic modification of vowel space in storybook speech to infants up to 2 years of age.
J Speech Lang Hear Res
; 58(2): 241-53, 2015 Apr.
Article
em En
| MEDLINE
| ID: mdl-25659121
ABSTRACT
PURPOSE:
A large body of literature has indicated vowel space area expansion in infant-directed (ID) speech compared with adult-directed (AD) speech, which may promote language acquisition. The current study tested whether this expansion occurs in storybook speech read to infants at various points during their first 2 years of life.METHOD:
In 2 studies, mothers read a storybook containing target vowels in ID and AD speech conditions. Study 1 was longitudinal, with 11 mothers recorded when their infants were 3, 6, and 9 months old. Study 2 was cross-sectional, with 48 mothers recorded when their infants were 3, 9, 13, or 20 months old (n=12 per group). The 1st and 2nd formants of vowels /i/, /É/, and /u/ were measured, and vowel space area and dispersion were calculated.RESULTS:
Across both studies, 1st and/or 2nd formant frequencies shifted systematically for /i/ and /u/ vowels in ID compared with AD speech. No difference in vowel space area or dispersion was found.CONCLUSIONS:
The results suggest that a variety of communication and situational factors may affect phonetic modifications in ID speech, but that vowel space characteristics in speech to infants stay consistent across the first 2 years of life.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Leitura
/
Acústica da Fala
/
Percepção da Fala
/
Fonética
/
Linguagem Infantil
Tipo de estudo:
Observational_studies
/
Prevalence_studies
/
Risk_factors_studies
Limite:
Adult
/
Child, preschool
/
Female
/
Humans
/
Infant
/
Male
Idioma:
En
Revista:
J Speech Lang Hear Res
Assunto da revista:
AUDIOLOGIA
/
PATOLOGIA DA FALA E LINGUAGEM
Ano de publicação:
2015
Tipo de documento:
Article