Reports on two studies on the acquisition by children of the voicing contrast in Mexican Spanish word-initial stops. The first was a longitudinal study. One analysis showed children unable to distinguish between voiced-voiceless stop cognate pairs at age 3;10. A spirantization analysis, however, more clearly revealed the children's phonological…

This paper reports on a longitudinal study of the acquisition of the voicing contrast in English word-initial stop consonants, as measured by voice onset time. Four monolingual children were recorded at two week intervals, beginning when the children were about 1;6. Data provided evidence for three general stages: (1) the child has no contrast;…