Socioeconomic Factors Account for Variability in Language Skills in Preschoolers with Autism Spectrum Disorders.
Lindsay Olson, Mikaela Kinnear, Bosi Chen and 5 others
PMID 33027104WHAT IT FOUND
Maternal education predicted language skills in young children with autism, independent of their diagnosis.
Children of mothers with less education had lower expressive and receptive language scores. This suggests home environment factors linked to education may influence early language development in autism.
Key findings
01Maternal education level was significantly associated with both expressive and receptive language scores in children with and without autism, even after accounting for diagnosis.
02Income-to-needs ratio and neighborhood median income were not significantly associated with language scores after correcting for multiple comparisons.
03History or intensity of prior interventions (such as speech or occupational therapy) did not show a significant association with language scores in the autism group.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The sample size was modest, limiting the ability to test complex models of how socioeconomic factors influence language. The study did not measure the home language environment directly (e.g., number of words heard), so the mechanism linking maternal education to language skills remains unclear. Mothers in the typically developing group had significantly higher education levels than those in the autism group, creating a correlation between diagnosis and maternal education that complicates interpretation. The study was cross-sectional, so it cannot determine causality or track changes over time. Income and neighborhood measures showed weaker or non-significant associations compared to maternal education, suggesting education may be a more specific proxy for relevant home factors.
Declared interests
The authors declared no conflict of interest. The study was supported by the National Institutes of Health (extramural) and non-U.S. government sources.
The easy way to misread this
Do not conclude that socioeconomic status causes language delays in autism. The study shows an association, primarily with maternal education, but does not prove that low education leads to poorer language. The home language environment, which was not measured, may be the actual factor linking education to language outcomes.