Unusual visual inspection of objects by infants 9 months of age and older is predictive of a later diagnosis of autism spectrum disorder (ASD), a new UC Davis Health study has found.
Unusual visual inspection is defined as:
- looking out of the corners of the eyes,
- holding an object up very close to the face,
- looking at something with one eye closed, or
- staring at an object uninterrupted for more than 10 seconds.
"Unusual visual inspection behavior has long been associated with autism but never yet as early as 9 months of age," said Meghan Miller, associate professor in the Department of Psychiatry and Behavioral Sciences and UC Davis MIND Institute and the first author on the study. The study, published in the Journal of Abnormal Psychology, also found that this behavior at 9 months predicted 12-month social behavior, but not vice versa. "The findings support major theories of autism which hypothesize that infants' over-focus on objects might be at the expense of their interest in people. Ultimately, this study suggests that unusual visual inspection of objects may precede development of the social symptoms characteristic of ASD," Miller said. Visual inspection, repetitive behavior and social engagement in children with autism. About 1 in 54 children in the U.S. has been identified with ASD. Younger siblings of children with autism are at an elevated risk of being diagnosed with autism, at a rate of approximately one in five. The researchers evaluated 89 infants whose older siblings have ASD (High-Risk group) and 58 infants with siblings with typical development (Low-Risk group). The infants completed a task designed to measure a variety of different ways of playing with and using objects at 9, 12, 15, 18, 24 and 36 months of age. Read more...
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