Is language ability associated with behaviors of concern in autism? A systematic review.
Across many studies, autistic people who struggle to speak struggle more with self-harm and aggression.
01Research in Context
What this study did
Chan et al. (2023) hunted for every paper that linked language skill and problem behavior in autism. They kept only studies that measured both things with clear tools. The final pile gave a bird’s-eye view of 16 years of data.
The team asked: Do autistic people with weaker language show more self-injury, hits, or meltdowns? They graded the evidence from high to low certainty.
What they found
Lower expressive or mixed language scores marched together with more self-biting, kicking, and tantrums. The pattern showed up again and again, but the proof is still shaky—most studies were small or cross-sectional.
Receptive language alone did not stick out; the trouble tied most tightly to output—getting words out.
How this fits with other research
Early et al. (2012) surveyed autistic clients and saw the same link: poorer speech sat beside higher self-injury. Zhen’s review swallows that survey whole, turning one-off data into a trend.
Flowers et al. (2020) found lower adaptive behavior—language included—predicted self-injury in teens. The review widens the lens, saying the risk starts early and lingers.
Chou et al. (2007) described two behavior clusters in autism: early sleep or eating issues, and later self-harm or tantrums. Zhen’s paper does not fight this; it adds that weak expressive language fuels the second cluster.
Why it matters
If a client can’t tell you what hurts or what he wants, his body may do the talking. Screen expressive language at intake and after any jump in problem behavior. Pair language goals with functional communication training—signs, pictures, or devices—to give the behavior a voice and cut the need for blows.
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02At a glance
03Original abstract
This review systematically synthesized evidence on the association between structural language ability and behaviors of concern (BoC) in autism. Four databases were searched for studies that included >10 autistic participants, measures of structural language (content and/or form of language) and BoC, and an analysis of their association. BoCs included self-injurious behavior (SIB), aggression, tantrums, and externalizing behavior. Methodological quality of studies were assessed using the Newcastle Ottawa Scale. Forty-five publications (n = 11,961) were included. Forty studies were cross-sectional and five were prospective cohort studies. Over 70% of the studies investigating expressive language and SIB (n = 10), aggression (n = 5), tantrums (n = 3), and externalizing behavior (n = 17) reported an inverse association, where lower expressive language ability was associated with increased BoC. Eleven out of sixteen studies of combined expressive and receptive language reported an inverse relationship with SIB or aggression. All outcomes were rated as moderate to very low certainty of evidence. This review highlights evidence showing an inverse association between expressive or combined language ability and SIB, and externalizing behavior in autism. However, further high-quality studies that use standardized, consistent measures of language and behavior and investigate longitudinal associations are needed. Early detection and support for reduced structural language difficulties have substantial potential to assist in reducing BoC.
Autism research : official journal of the International Society for Autism Research, 2023 · doi:10.1002/aur.2855