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. 2007 Jan;37(1):158-70.
doi: 10.1007/s10803-006-0339-z. Epub 2006 Dec 27.

Variation in Vocal-Motor Development in Infant Siblings of Children With Autism

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Free PMC article

Variation in Vocal-Motor Development in Infant Siblings of Children With Autism

Jana M Iverson et al. J Autism Dev Disord. .
Free PMC article

Abstract

In this study we examined early motor, vocal, and communicative development in a group of younger siblings of children diagnosed with autism (Infant Siblings). Infant Siblings and no-risk comparison later-born infants were videotaped at home with a primary caregiver each month from 5 to 14 months, with follow-up at 18 months. As a group, Infant Siblings were delayed in the onset of early developmental milestones and spent significantly less time in a greater number of postures, suggestive of relative postural instability. In addition, they demonstrated attenuated patterns of change in rhythmic arm activity around the time of reduplicated babble onset; and they were highly likely to exhibit delayed language development at 18 months.

Figures

Fig. 1
Fig. 1
Change in rate of rhythmic arm activity (a) and proportions of arm and finger rhythmicities (b) in relation to reduplicated babble onset in Infant Siblings and NR infants.

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