Relations between fine motor skills and intelligence in typically developing children and children with attention deficit hyperactivity disorder.
Fine-motor and thinking skills are tightly coupled in kids with ADHD—use motor tasks as a quick cognitive thermometer.
01Research in Context
What this study did
The team tested 8- to young learners kids. Half had ADHD. Half were neurotypical.
Each child completed fine-motor tasks like peg boards and tracing. They also took an IQ test.
The study asked: do better motor scores go hand-in-hand with higher IQ scores?
What they found
For both groups, kids with smoother motor skills scored higher on every IQ index.
The link was twice as strong in the ADHD group. Fine-motor skill explained more of their IQ variance.
In plain words: when a child with ADHD struggles to place tiny pegs, their thinking scores are likely lower too.
How this fits with other research
Howe et al. (2017) built a computer test that also mixes motor and visual tasks. Their tool predicts handwriting trouble, backing the idea that motor and cognitive skills travel together.
Samyn et al. (2015) warn that parent questionnaires and hands-on EF tasks measure different things. So if you want the motor-cognitive picture, test with objects, not just surveys.
Gilboa et al. (2014) found that kids with NF-1 fail writing tasks because of poor planning, not just shaky hands. Together these papers say: always pair motor drills with cognitive planning checks.
Why it matters
If you run academic or social-skills programs for kids with ADHD, add quick fine-motor warm-ups. Try bead threading, tweezers, or maze tracing for five minutes before table work. The motor practice may give a small boost to attention and reasoning. It also gives you an on-the-spot cue: if the child’s fingers falter, simplify your language or break the cognitive task into smaller steps.
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02At a glance
03Original abstract
BACKGROUND: The embodied cognition hypothesis implies a close connection between motor and cognitive development. Evidence for these associations is accumulating, with some studies indicating stronger relations in clinical than typically developing samples. AIMS: The present study extends previous research and investigates relations between fine motor skills and intelligence in typically developing children (n = 139, 7-13 years) and same-aged children with attention deficit hyperactivity disorder (ADHD, n = 46). In line with previous findings, we hypothesized stronger relations in children with ADHD than in typically developing children. METHODS AND PROCEDURE: Fine motor skills were assessed using the standardized Movement Assessment Battery for Children. Intelligence was measured with the standardized Wechsler Intelligence Scale for Children. OUTCOMES AND RESULTS: Regression analyses indicated significant relations between fine motor skills and full-scale IQ, perceptual reasoning, working memory, and processing speed. Moderation analyses identified stronger relations between fine motor skills and full-scale IQ, perceptual reasoning, and verbal comprehension in children with ADHD compared to typically developing children. CONCLUSIONS AND IMPLICATIONS: Results suggest a close relation between fine motor skills and intelligence in children with and without ADHD, with children diagnosed with ADHD showing stronger relations. Findings support combined motor-cognitive interventions in treating children with ADHD.
Research in developmental disabilities, 2021 · doi:10.1016/j.ridd.2021.103855