Longitudinal Analyses of Early Verb Production in Autism Spectrum Disorder.
Kaya LeGrand, Julia Parish-Morris, Letitia R Naigles
PMID 41128967WHAT IT FOUND
Children with autism showed slower early growth in different verbs than typically developing peers, but only because some had stable low verb use; excluding them removed the group difference.
Early growth in different verbs tracked later language scores; early noun growth did not.
Key findings
01Verb production increased over time, but typically developing children produced more different verbs and increased faster than children with autism.
02A low, stable verb profile contained only children with autism, and after removing those children, the group difference in verb production was no longer significant.
03Growth in different verbs from the first three visits predicted later language scores, while growth in nouns did not predict any later outcomes.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
This was an observational study of language development, not a treatment trial, so it does not show whether therapy changes verb growth. The trajectory groups were exploratory and based on 67 children, so they may not be the same in larger samples. The autism group was older than the typically developing group at the first visit, even though starting expressive language scores were similar. All children in the autism group were receiving Applied Behavior Analysis for at least 20 hours per week, so language patterns may reflect that context. Fourteen play sessions were missing, and some sessions were shorter than planned. Verb counts came only from parent-child play sessions, so a child's mood or the setting could affect the results.
Declared interests
The authors declared no conflicts of interest.
The easy way to misread this
Do not read this as showing that all autistic children have a verb deficit or that verb therapy improves language. The overall group difference was driven by a subset with stable low verb growth, and that difference disappeared when those children were removed. No treatment was tested.
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 →