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the claim

Increased motor development occurs at the expense of speech development

the verdict
REFUTED
the evidence says no
Recorded sources
0 sources for · 5 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that increased motor development occurs at the expense of speech development?

No. Evidence consistently shows that motor development and language development are positively correlated rather than inversely related. Children with better motor skills typically demonstrate better, rather than poorer, expressive and receptive language abilities.

Verdict: REFUTED · 0 sources for, 5 against · Last checked

The analysis

The retrieved literature consistently demonstrates positive correlations and predictive relationships between motor development and language development (e.g., fine and gross motor skills predicting expressive and receptive vocabulary). None of the papers support the idea that increased motor development occurs at the expense of speech development; instead, they show these developmental domains progress together.

Evidence against · 5
Fine Motor Skill Predicts Expressive Language in Infant Siblings of Children with Autism
2013
Fine motor skills significantly predicted later expressive language rather than developing at its expense.
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LeBarton, E. S. & Iverson, J. M. (2013). Fine Motor Skill Predicts Expressive Language in Infant Siblings of Children with Autism. doi.org. https://doi.org/10.1111/desc.12069

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More against · 4
Predicting the rate of language development from early motor skills in at-risk infants who develop autism spectrum disorder
2015
Early gross and fine motor skills positively predicted the subsequent rate of expressive language development.
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Leonard, H., Bedford, R., Pickles, A., & Hill, E. (2015). Predicting the rate of language development from early motor skills in at-risk infants who develop autism spectrum disorder. doi.org. https://doi.org/10.1016/J.RASD.2014.12.012

Fine motor skills and expressive language: a study with children with congenital hypotyreoidism.
2017
Motor and expressive language skills are positively associated and develop interdependently rather than competitively.
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Frezzato, R. C., Santos, D. C., Goto, M. M., Ouro, M. P. C. d., Santos, C., Dutra, V. F., & Lima, M. C. M. P. (2017). Fine motor skills and expressive language: a study with children with congenital hypotyreoidism.. doi.org. https://doi.org/10.1590/2317-1782/20172016064

Language Profiles and Their Relation to Cognitive and Motor Skills at 30 Months of Age: An Online Investigation of Low-Risk Preterm and Full-Term Children.
2021
Lower motor scores are associated with poorer language profiles, indicating concurrent rather than trade-off development.
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Sansavini, A., Zuccarini, M., Gibertoni, D., Bello, A., Caselli, M. C., Corvaglia, L., & Guarini, A. (2021). Language Profiles and Their Relation to Cognitive and Motor Skills at 30 Months of Age: An Online Investigation of Low-Risk Preterm and Full-Term Children.. doi.org. https://doi.org/10.1044/2021_JSLHR-20-00636

Fine motor skills and their link to receptive vocabulary, expressive vocabulary, and narrative language skills
2024
Fine motor skills positively predicted receptive vocabulary, expressive vocabulary, and narrative language skills.
Get citation
Winter, R. E., Stoeger, H., & Suggate, S. P. (2024). Fine motor skills and their link to receptive vocabulary, expressive vocabulary, and narrative language skills. doi.org. https://doi.org/10.1177/01427237241233084

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What does the evidence say?

The retrieved literature consistently demonstrates positive correlations and predictive relationships between motor development and language development (e.g., fine and gross motor skills predicting expressive and receptive vocabulary). None of the papers support the idea that increased motor development occurs at the expense of speech development; instead, they show these developmental domains progress together.

Receipt History
first checked04 Aug 2026
judged → REFUTED · 1404 Aug 2026
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