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Doctor of Philosophy (PHD)
Psychology (Arts and Sciences)
Date of Defense
First Committee Member
Daniel S. Messinger - Committee Chair
Second Committee Member
Christine Delgado - Committee Member
Third Committee Member
Michael Alessandri - Committee Member
Fourth Committee Member
Marygrace Kaiser - Committee Member
Fifth Committee Member
Harvey Siegel - Committee Member
Infants with older siblings on the autism spectrum (ASD-sibs) are at risk for socio-emotional difficulties. ASD-sibs were compared to children of typically developing siblings (TD-sibs) in the Face-to-Face/Still-Face (FFSF) at 6 months and the Early Social Communication Scales (ESCS) at 8, 10, 12, 15, and 18 months. ASD-sibs exhibited non-significant trends to smile less and display more neutral affect than TD-sibs during the FFSF. There was a significant status by gender interaction such that male ASD-sibs showed less smiling and lower affective valence compared to male TD-sibs. Additionally, ASD-sibs showed a lack of emotional continuity in the FFSF. ASD-sibs displayed less initiating joint attention, initiating behavioral requesting, and responding to joint attention over time than TD-sibs. Results are discussed with respect to the social orienting model of autism.
Autism; Pervasive Developmental Disorder; Sibling; Early Identification; Emotion; Joint Attention
Cassel, Tricia D., "Examination of the Communicative Deficits Associated with the Broad Phenotype of Autism in Infant Siblings of Children with Autism Spectrum Disorders" (2008). Open Access Dissertations. 129.