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Download full textProctor, Adele – 1987
This bibliographic review aims to present a single comprehensive source of references to facilitate clinical application of data obtained on the vocal activity of normal infants and to facilitate continued research on prelinguistic vocal output. The bibliography cites the published observational, empirical, and theoretical reports that examine the…
Descriptors: Child Language, Communication Disorders, Expressive Language, High Risk Persons
Peer reviewedGopnik, Alison; Meltzoff, Andrew N. – Child Development, 1986
Compares two types of semantic development (the acquisition of disappearance words and success-failure words) to performance on two types of cognitive tasks (object-permanence and means-ends tasks) among infants. (HOD)
Descriptors: Child Development, Cognitive Development, Concept Formation, Developmental Stages
Steffens, Michele L.; And Others – American Journal on Mental Retardation, 1992
The development of early vocalizations was investigated with 13 infants who had Down's syndrome and 27 infants developing normally, at bimonthly intervals from 4 to 18 months of age. Both groups demonstrated increased production of mature syllables over time as well as large variations in vocal development, both within and across groups and across…
Descriptors: Child Development, Comparative Analysis, Downs Syndrome, Individual Differences
