Comparing Motor Skills in Autism Spectrum Individuals With and Without Speech Delay.
Autistic clients who spoke on time may still have slow, clumsy two-hand moves—check and teach fine-motor skills.
01Research in Context
What this study did
The team split autistic people into two groups. One group had early speech delay. The other group talked on time.
Everyone took quick motor tests. The tests checked how well both hands work together and how fast the eyes track moving dots.
What they found
The autistic group that talked on time moved both hands together more slowly. Their eye tracking was a hair faster, but the hand gap stayed.
Speech delay did not predict the result. The early talkers were the ones who stumbled on fine-motor speed.
How this fits with other research
Allen et al. (2001) saw no difference between the same two groups on 71 skills. Their sample only included children with normal IQ. That IQ rule may have washed out the small motor gap Maddox et al. (2015) caught.
Payne et al. (2020) used the same split and found wider trouble. Kids with speech delay also showed weaker executive function and motivation. Together the papers map a chain: speech delay flags broad brain systems, while no delay still hides a fine-motor speed hit.
Scior et al. (2023) flipped the lens. They showed that fine-motor skill predicts how clear a child’s words sound. The new study adds that even verbal autistic clients can have sneaky motor slowness, so both lines point to checking hands when language is the goal.
Why it matters
During intake, ask parents if the child talked on time. If yes, still run a quick two-hand task like threading beads or catching a ball. Add fine-motor goals to the plan before they slow down play, typing, or vocational tasks.
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02At a glance
03Original abstract
Movement atypicalities in speed, coordination, posture, and gait have been observed across the autism spectrum (AS) and atypicalities in coordination are more commonly observed in AS individuals without delayed speech (DSM-IV Asperger) than in those with atypical or delayed speech onset. However, few studies have provided quantitative data to support these mostly clinical observations. Here, we compared perceptual and motor performance between 30 typically developing and AS individuals (21 with speech delay and 18 without speech delay) to examine the associations between limb movement control and atypical speech development. Groups were matched for age, intelligence, and sex. The experimental design included: an inspection time task, which measures visual processing speed; the Purdue Pegboard, which measures finger dexterity, bimanual performance, and hand-eye coordination; the Annett Peg Moving Task, which measures unimanual goal-directed arm movement; and a simple reaction time task. We used analysis of covariance to investigate group differences in task performance and linear regression models to explore potential associations between intelligence, language skills, simple reaction time, and visually guided movement performance. AS participants without speech delay performed slower than typical participants in the Purdue Pegboard subtests. AS participants without speech delay showed poorer bimanual coordination than those with speech delay. Visual processing speed was slightly faster in both AS groups than in the typical group. Altogether, these results suggest that AS individuals with and without speech delay differ in visually guided and visually triggered behavior and show that early language skills are associated with slower movement in simple and complex motor tasks.
Autism research : official journal of the International Society for Autism Research, 2015 · doi:10.1002/aur.1483