Adapting syntax in writing to varying audiences as a function of age and social cognitive ability

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Abstract
Fourth-, eighth-, twelfth-graders and expert adults each wrote persuasive messages to three audiences arrayed along a dimension of intimacy to writer. Measures of social cognitive ability were also obtained. Scripts were analysed for (1) fluency, (2) subordination, (3) clause length, (4) logical adverbial clauses, and (5) conjunctions of conclusion. In addition to general developmental trends, results indicated effects of audience adaptation and of mediation of social cognitive ability. Findings support the view that evidence of later language development must be interpreted in light of communicative demands of tasks and subjects' rhetorical skills.