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23-04-2020 | Original Paper Open Access

Early Motor Differences in Infants at Elevated Likelihood of Autism Spectrum Disorder and/or Attention Deficit Hyperactivity Disorder

Journal of Autism and Developmental Disorders
Jannath Begum Ali, Tony Charman, Mark H. Johnson, Emily J. H. Jones, and the BASIS/STAARS Team
Belangrijke opmerkingen

Electronic supplementary material

The online version of this article (https://​doi.​org/​10.​1007/​s10803-020-04489-1) contains supplementary material, which is available to authorized users.
Mark H. Johnson and Emily J. H. Jones are joint senior authors.
BASIS/STAARS Team members listed in the Acknowledgements section.

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We investigated infant’s manual motor behaviour; specifically behaviours crossing the body midline. Infants at elevated likelihood of Autism Spectrum Disorder (ASD) and/or Attention Deficit Hyperactivity Disorder (ADHD) produced fewer manual behaviours that cross the midline compared to infants with a typical likelihood of developing these disorders; however this effect was limited to 10-month-olds and not apparent at age 5 and 14 months. Although, midline crossing did not predict ASD traits, it was related to ADHD traits at 2 years of age. We rule out motor ability and hand dominance as possible explanations for this pattern of behaviour, positing that these results may be a consequence of multisensory integration abilities, and the neurobehavioural shift period, in the first year of life.

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