Cognitive and Behavioural Associations of Visual and Hearing Impairments Across the Lifespan in People With Down Syndrome, a Scoping Review.
Nicolo J Betoni, Cynthia M Okamoto, Ira T Lott and 1 others
PMID 40377220WHAT IT FOUND
Uncorrected hearing loss in children with Down syndrome is linked to language delays, while visual impairment in adults is linked to reduced daily living skills.
However, evidence is mostly cross-sectional, so these are associations rather than proof that treating the senses improves cognition.
Key findings
01Hearing impairments in infancy and childhood are consistently associated with delays in language development, including expressive and receptive skills.
02Visual impairments in childhood and adulthood are associated with challenges in adaptive behaviours, literacy skills, and daily living independence.
03Eight included studies found no significant association between sensory impairments and cognitive or behavioural outcomes, indicating inconsistent evidence.
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
Most included studies were cross-sectional, so it is impossible to determine if sensory impairments cause cognitive or behavioural issues or if they co-occur. 57.9% of the studies were published more than 15 years ago, so the findings may not reflect current screening or treatment standards. Many studies did not report the age of onset or duration of the sensory impairments, making it unclear if the impairments were recent or long-standing. Definitions of 'uncorrected' varied, and some studies included participants who had been previously treated for sensory issues.
Declared interests
The authors declare no conflicts of interest. The study was funded by the National Institute on Aging.
The easy way to misread this
Do not assume that correcting hearing or vision will automatically improve cognitive or behavioural outcomes. The evidence is largely cross-sectional and associative, meaning that while sensory impairments and cognitive challenges co-occur, this review does not prove that treating the senses reverses the cognitive deficits.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →