This investigation studied (1) the acquisition and proportion of correct usage of consonants of Japanese and American children, (2) the consonant substitutions of children developing normal language and of children with articulation problems, and (3) confusion in adults' recall of consonants. A system of distinctive features (gravity, diffuseness,…

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…