Despite the assumption in early studies that children are monostylistic until sometime around adolescence, a number of studies since then have demonstrated that adult-like patterns of variation may be acquired much earlier. How much earlier, however, is still subject to some debate. In this paper we contribute to this research through an analysis of a number of lexical, phonological and morphosyntactic variables across 29 caregiver/child pairs aged 2;10 to 4;2 in interaction with their primary caregivers. We first establish the patterns of use -both linguistic and social -in caregiver speech and then investigate whether these patterns of use are evident in the child speech. Our findings show that the acquisition of variation is highly variable dependent: some show age differentiation, others do not; some show acquisition of style shifting, others do not; some show correlations between caregiver input and child output, others do not. We interpret these findings in the light of community norms, social recognition and sociolinguistic value in the acquisition of variation at these early stages.1 We gratefully acknowledge the support of the Economic and Social Research Council for award no RES-000-22-0447 and the British Academy for award no. SG/45936. This research was also supported in part by the program Apprentissages, connaissances et société funded by the ANR (French national agency for research). We thank Paul Foulkes, Jean-Pierre Chevrot, and two anonymous reviewers for very helpful feedback on earlier versions of this manuscript. We would also like to thank Moira Smith, our invaluable on-site fieldworker, and the caregivers and children of Buckie who so warmly welcomed us into their hooses.Brought to you by | Purdue University Libraries Authenticated Download Date | 5/28/15 11:59 PM 286 J. Smith et al.