Document Detail

Early ontogeny of vocal behavior of Japanese infants in response to maternal speech.
MedLine Citation:
PMID:  1446547     Owner:  NLM     Status:  MEDLINE    
Discriminant analysis was used to distinguish statistically between the comfort-state vocalizations uttered by Japanese infants following 5 different types of pitch contours of maternal speech. Ontogenetic changes of their vocal behaviors were investigated during the first 5 months of life. Structural variability in infant vocalizations across variants of maternal speech was found to be characterized by a set of quantifiable physical parameters. However, infant's age when a vocalization was recorded was not an important contributor. Successful attempts at cross-validation, in which the discriminant profiles derived from one sample of vocalizations were used to classify a second set of vocalizations, indicated that the result obtained was not an artifact of using the same data set to derive the profiles to test reclassification accuracy. Proportion of cross-validated vocalizations that were misclassified decreased as age increased. The results of the present study demonstrate that a statistically significant relation exists between acoustic features of maternal speech and those of following infant vocalizations, and that such a relation strengthens over age.
N Masataka
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Child development     Volume:  63     ISSN:  0009-3920     ISO Abbreviation:  Child Dev     Publication Date:  1992 Oct 
Date Detail:
Created Date:  1992-12-29     Completed Date:  1992-12-29     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0372725     Medline TA:  Child Dev     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1177-85     Citation Subset:  IM    
Department of Anthropology, Faculty of Science, University of Tokyo, Japan.
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MeSH Terms
Infant, Newborn
Maternal Behavior*
Mother-Child Relations
Speech Perception
Verbal Behavior*

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