What are the sources of variation in the input, and how much do they matter for language acquisition? This study examines frequency variation in manner-of-articulation classes in child and adult input. The null hypothesis is that segmental frequency distributions of language varieties are unigram (modelable by stationary, ergodic processes), and…

Previous research using the name-based categorization task has shown that 20-month-old infants can simultaneously learn 2 words that only differ by 1 consonantal feature but fail to do so when the words only differ by 1 vocalic feature. This asymmetry was taken as evidence for the proposal that consonants are more important than vowels at the…

In a landmark study, Jusczyk and Aslin (1995 ) demonstrated that English-learning infants are able to segment words from continuous speech at 7.5 months of age. In the current study, we explored the possibility that infants segment words from the edges of utterances more readily than the middle of utterances. The same procedure was used as in…

Investigates the role of imitation by children in the acquisition of lexical items and factors influencing word acquisition by imitation. Imitation did not appear to facilitate subsequent spontaneous use of lexical items. Results are discussed in terms of conditions which influence imitative behavior in children. (JMB)

Revised version of a paper presented at the 1971 summer meeting of the Linguistic Society of America at Buffalo, New York. Research supported in part by a National Science Foundation grant made to the Phonology Laboratory, University of California, Berkeley. (VM)

This paper examines the acquisition of English fricatives and is a preliminary report on one aspect of the Child Phonology Project at Stanford University. A characterization of English fricatives is presented, followed by a summary of current information on their acquisition. Three sample hypotheses from the Stanford project are discussed in…

The phonotactic development of one child is traced from age 3;9 to 5;3. Data are presented in a table indicating both the child's phonological equivalent of adult consonant sequences and the range distinguished by the child at a given stage. (CHK)

Refutes the reanalysis of a phonologically disordered child's use of fricatives as developed by Fey (1989) within a relational framework. Evidence in the form of nonsystematic correspondence between the child's substitution patterns and the target sound system is used to further establish accuracy of the original independent generative analysis…

Results are reported of a study of voice onset time characteristics of stops in initial clusters in American English words produced by children and adults. (Author/RM)

The development of differential vowel duration was observed in six children who were tape recorded at 1-month intervals from 26 to 36 months of age and in three children from 21 to 24 months of age. By differential vowel duration is meant the relatively different durations of vowels according to whether the following consonant is voiced or…

The development of differential vowel duration was observed in six children who were tape recorded at 1-month intervals from 26 to 36 months of age and in three children from 21 to 24 months of age. By differential vowel duration is meant the relatively different durations of vowels according to whether the following consonant is voiced or…

A preliminary study dealt with the ways in which children between six and seven years of age organize spoken language, specifically aspects of the temporal and segmental structure of polysyllabic English words containing the syllable C/jul/ (e.g., pediculous). (Author/SW)

This paper represents a partial condensation of the results of a study covering 14 months in a Russian-speaking child's phonological development. Evidence supports a theory of phonological acquisition formulated by Olmsted (1971), and offers detailed information on the child's acquisition of specific phones. (CHK)

Reports a method of clinically inducing a phonemic split in a misarticulating child. Three stages were observed in the acquisition of this split: (1) complementary distribution (allophones of the same phoneme); (2) position-specific free variation (intermediate to the phonemic split); and (3) phonemic distribution for some morphemes (phonemic…

The effects of phonetic context and linguistic complexity level on /s/ misarticulations were examined in nine normal children (mean age 6.8 years) who misarticulated the /s/ phoneme interdentally in all positions of words. (Author/SEW)