Examined ability of Quebec French-speaking first graders to categorize words on the basis of vowel categories. Found that ability to categorize vowels does not develop uniformly but is affected by degree of spectral/articulatory proximity between vowels, by syllable structure, and potentially by characteristics of the input phonology. (JPB)

This paper reports on a longitudinal study of the acquisition of the voicing contrast in American-English work-initial stop consonants, as revealed through instrumental analysis of voice onset time characteristics. Four monolingual children were recorded at approximately two week intervals, beginning when the children were about 1;6. Data provide…