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J Autism Dev Disord. 2007 Jan;37(1):122-32. Epub 2006 Dec 21.

Early social and emotional communication in the infant siblings of children with autism spectrum disorders: an examination of the broad phenotype.

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  • 1Department of Psychology, University of Miami, P.O. Box 248185, Coral Gables, FL, 33124-0751, USA.

Abstract

Infants with older siblings with Autism Spectrum Disorders (ASD-sibs) are at risk for socioemotional difficulties. ASD-sibs were compared to infants with typically developing older siblings (TD-sibs) using the face-to-face/still-face (FFSF) at 6 months and the Early Social Communication Scale (ESCS) at 8, 10, 12, 15, and/or 18 months. ASD-sibs smiled for a lower proportion of the FFSF than TD-sibs and lacked emotional continuity between episodes. With respect to TD-sibs, ASD-sibs engaged in lower rates of initiating joint attention at 15 months, lower rates of higher-level behavioral requests at 12 months, and responded to fewer joint attention bids at 18 months. The results suggest subtle, inconsistent, but multi-faceted deficits in emotional expression and referential communication in infants at-risk for ASDs.

PMID:
17186367
[PubMed - indexed for MEDLINE]
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