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New research unveils three distinct language comprehension phenotypes in autistic children

April 22, 2024
in Science Education
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New research unveils three distinct language comprehension phenotypes in autistic children
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According to The National Institute on Deafness and Other Communication Disorders (NIDCD), Autism Spectrum Disorder, or ASD, can affect children’s language development and communication in a variety of ways. While some children with ASD may encounter difficulties communicating verbally, others exhibit impressive vocabularies and the ability to speak on specific topic areas in detail. A new study led by Boston University neuroscientist Dr. Andrey Vyshedskiy examines these unique pathways of language development in autistic children. Published in npj Mental Health Research, this research, encompassing data from over 31,000 autistic individuals, stands as the most extensive of its kind on language comprehension acquisition in autism. Dr. Vyshedskiy’s study supports an idea he had more than two decades ago: that language learning for autistic individuals doesn’t happen in a straight line but goes through three different stages. In this Q&A, he discusses the key takeaways from the research, and its implications for clinicians, educators, and caregivers.

According to The National Institute on Deafness and Other Communication Disorders (NIDCD), Autism Spectrum Disorder, or ASD, can affect children’s language development and communication in a variety of ways. While some children with ASD may encounter difficulties communicating verbally, others exhibit impressive vocabularies and the ability to speak on specific topic areas in detail. A new study led by Boston University neuroscientist Dr. Andrey Vyshedskiy examines these unique pathways of language development in autistic children. Published in npj Mental Health Research, this research, encompassing data from over 31,000 autistic individuals, stands as the most extensive of its kind on language comprehension acquisition in autism. Dr. Vyshedskiy’s study supports an idea he had more than two decades ago: that language learning for autistic individuals doesn’t happen in a straight line but goes through three different stages. In this Q&A, he discusses the key takeaways from the research, and its implications for clinicians, educators, and caregivers.

Can you summarize the main insights from this study?

The common intuitive belief is that language comprehension development follows a linear trajectory: children acquire one grammatical rule at a time. Based on a neurological approach, I predicted over 20 years ago that instead of linear development, language unfolds in three steps corresponding to three language comprehension mechanisms of increasing complexity. The new study of over 31,000 autistic individuals, published in the journal npj Mental Health Research, validates this prediction. The implications of this discovery are important for philosophy, paleoanthropology, linguistics, clinical medicine, and for improving language therapy interventions for children with autism.

What was the traditional understanding of how children develop language, and how does this research challenge that view?

The current practice of characterizing children’s communication ability only in terms of their speech (i.e., verbal, nonverbal, or minimally verbal) is insufficient and one-sided. The new results show that communication abilities can vary independent of verbal abilities. For example, nonverbal children with full syntactic language comprehension have normal ability to communicate albeit nonverbally, while verbal children lacking syntactic language comprehension do not have a normal ability to communicate by any means. The new study demonstrates that the three identified language comprehension mechanisms are neurologically and clinically distinct from the speech ability. A combined two-dimensional language characterization in terms of both language comprehension and verbal level will result in better identification of children’s communication ability and lead to more children reaching their full linguistic potential.

How many people were involved in this study? How did the research team collect and analyze information?

This is the largest study of language comprehension acquisition in autistic children. The study included over 31,000 individuals. The study was conducted by surveying parents via a language therapy app popular among families with children diagnosed with autism and other language deficits.

Based on your research findings, how might clinicians and educators adapt their approaches to assessment and intervention to better address the diverse communication abilities of autistic children?

Language comprehension in children is commonly assessed based on vocabulary. This evaluation method can grossly misrepresent the child’s actual language comprehension progress. Moreover, it encourages therapists to focus on vocabulary training at the expense of exercises that build full language comprehension. The new study provides evidence for creating new assessments evaluating the three mechanisms of language comprehension. These assessments are poised to improve language therapy interventions and enhance outcomes for individuals with language deficits.

What advice would you give to parents or caregivers based on the implications of this research for understanding and fostering language development in autistic children?

Focus all your efforts on improving your child’s language comprehension. Connecting words is more important than building vocabulary. You can find language comprehension exercises in the book I wrote for parents: This Way to Language: Four Things to Do at the First Sign of Autism.

Moving forward, what areas of research or practice do you believe warrant further exploration to better understand and help autistic children with their language development?

Our recent research demonstrates that the critical period for language acquisition is significantly shorter in autistic children compared to typical children. The shortened critical period may be the main culprit preventing autistic children from acquiring full language. These findings suggest that intensive language therapy has to start much earlier in children with suspected language deficits and encourages research into the possibility of pharmacological extension of the critical period for language acquisition.

 

Republishers are kindly reminded to uphold journalistic integrity by providing proper crediting, including a direct link back to the original source URL here.



Journal

npj Mental Health Research

DOI

10.1038/s44184-024-00062-1

Method of Research

Observational study

Subject of Research

People

Article Title

Are there distinct levels of language comprehension in autistic individuals – cluster analysis

Article Publication Date

10-Apr-2024

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