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ABSTRACT Adjustments in speech made by 2- and 3-year-old children when talking to their 14-month-old siblings are described and compared with those made by mothers addressing their babies. ‘Clarification’ adjustments were made by all the children, but there were marked individual differences in the frequency of questions and ‘affective-expressive’ features – differences related to the quality of the relationship between the siblings. The pattern of speech adjustments reflected the social contexts in which the children addressed their siblings; within these contexts (prohibitory and playful) children as young as 2 make appropriate use of communicative devices. The individual differences between the children indicate two sources of influence on the adjustments made – pragmatic and emotional.
Dunn et al. (Fri,) studied this question.