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the claim

Pacifier use causes speech delay in toddlers and young children.

the verdict
CONTESTED PARTIAL
Recorded sources
2 sources for · 1 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 Pacifier use causes speech delay in toddlers and young children?

Partly. Evidence on whether pacifier use causes speech delay is mixed and only partial: one review reports associations between prolonged pacifier use and smaller vocabularies while noting the relationship remains debatable, and a 2025 study of 18-36-month-olds found no significant association with vocabulary size. No retrieved item establishes a causal link at the strength the claim asserts.

Verdict: CONTESTED PARTIAL · 2 sources for, 1 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 2
Does the Duration and Frequency of Dummy (Pacifier) Use Affect the Development of Speech?
2021
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Charlie, S., Ghada, K., & Joe, W. (2021). Does the Duration and Frequency of Dummy (Pacifier) Use Affect the Development of Speech?. eric.ed.gov. https://doi.org/10.1111/1460-6984.12605

Evidence against · 1
Impact of pacifier use and parenting characteristics on toddlers’ vocabulary development
2025
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Barca, L., Mazzuca, C., & Borghi, A. M. (2025). Impact of pacifier use and parenting characteristics on toddlers’ vocabulary development. doi.org. https://doi.org/10.3389/fpsyg.2025.1599801

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More for · 1
The effects of prolonged pacifier use on language development in infants and toddlers
2024
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Kanellopoulos, A. K. & Costello, S. E. (2024). The effects of prolonged pacifier use on language development in infants and toddlers. doi.org. https://doi.org/10.3389/fpsyg.2024.1349323

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