Abstract
Later-born siblings of children with autism spectrum disorder (Sibs-ASD) are at elevated risk for social impairments. Two putative predictors of later social impairment—measures of responding to joint attention and weighted triadic communication—were examined in a sample of 43 Sibs-ASD who were followed from 15 to 34 months of age. Results revealed that initial level of responding to joint attention and growth rate of weighted triadic communication predicted the degree of social impairment at the final measurement period. Additionally, both predictors were associated with later ASD diagnosis. In contrast, unweighted triadic communication, age of entry into the study, and initial language level did not predict later social impairment. The importance of considering social outcome as a continuous variable in prospective studies of Sibs-ASD is discussed.
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Acknowledgments
We thank the families that participated in this study and the following research staff, graduate students, and clinical staff that made this research possible: Linda Ashford, Eric Esters, Jennifer Foss-Feig, James Kretzer, Justin Lane, Evon Lee, Laura McLean, Caitlin McMahon, Melissa Moss, Joanna Mussey, Ayesha Nasmyth, Anne Osberger, Alison Presmanes, Stacie Pozdol, Amy Swanson, Meredith Townes, Holly Turbeville, Lauren Turner, Teresa Ulman, and Kelly Wendel. This research was supported by grant number R01 HD043292, with additional support from grant numbers P30 HD15052, T32 HD 07226, and the Vanderbilt Kennedy Center Marino Autism Research Institute (MARI). The content is solely the responsibility of the authors and does not necessarily represent the official views of the funding agencies or the National Institutes of Health.
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Yoder, P., Stone, W.L., Walden, T. et al. Predicting Social Impairment and ASD Diagnosis in Younger Siblings of Children with Autism Spectrum Disorder. J Autism Dev Disord 39, 1381–1391 (2009). https://doi.org/10.1007/s10803-009-0753-0
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DOI: https://doi.org/10.1007/s10803-009-0753-0