Developmental associations between motor and communication outcomes in Fragile X syndrome: Variation in the context of co-occurring autism.
Elizabeth A Will, Kimberly J Hills, Kayla Smith and 2 others
PMID 38456297WHAT IT FOUND
Early fine motor skills predicted receptive communication in all children with Fragile X.
However, the link between motor development and expressive communication differed by autism status. Children without autism relied on early motor levels, while those with autism relied on how quickly their motor skills improved.
Key findings
01Early fine motor skills significantly predicted receptive communication outcomes for both children with FXS-only and those with co-occurring FXS+ASD.
02For children with FXS-only, early fine motor skills predicted expressive communication, but the rate of motor development did not.
03For children with FXS+ASD, the rate of fine motor development predicted expressive communication, but early fine motor skills did not.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTsWhat it means for SLPs
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What it does not show
Communication outcomes were based on parent report rather than direct observation, which may introduce bias. The sample included only 14 females, preventing analysis of sex-specific differences in motor-communication links. The study analyzed groups separately to maximize power but did not directly test statistical differences between the groups. The sample size was modest (51 participants), limiting the generalizability of the findings.
Declared interests
None reported in the provided text.
The easy way to misread this
Do not assume that motor delays cause communication delays in a simple linear way for all children with Fragile X. The study shows that for children with co-occurring autism, it is the speed of motor development, not the initial motor level, that links to expressive communication. This means a child with low initial motor skills but rapid improvement may still have better expressive outcomes than a child with stable but poor motor skills.