Four adults and 16 five-year-olds were asked to repeat words that differed in voicing of initial and final stop consonants and then to respond to revision requests. Children and adults decreased vowel duration and increased final closure duration in revised speech, regardless of the source of miscomprehension. (Author/JDD)

This study found that the speech of mothers (n=28) of toddlers slow to acquire expressive language tended to differ only in the frequency of use of lexical contingency devices (specifically expansion and extension of child speech), when compared to mothers of normally speaking toddlers. (Author/DB)