Autism
Is Language Impairment in Autism Unique?
Open access · cc by · source: Europe PMC
While individuals with autism and those with syntactic developmental language impairment score similarly on language tests, their specific error types and underlying cognitive deficits are fundamentally different.
Key findings
The group with autism made numerous pragmatic mistakes, such as providing off-topic responses or descriptions unrelated to the experimenter's questions, whereas the language-impaired group only made grammatical errors. Additionally, while the language-impaired group showed a selective difficulty with object relative clauses, the group with autism struggled across all sentence formats, including basic sentences without complex grammar. The youth with autism also frequently failed to correctly read homographs in simple contexts, whereas the language-impaired group only struggled with them in complex sentences.
Methodology
Researchers compared 18 Hebrew-speaking youth with autism to peers with syntactic developmental language impairment and typically developing controls across three language tasks. These assessments measured the participants' ability to construct relative clauses from picture cues, read and paraphrase sentences with homographs, and repeat sentences of different grammatical structures.
Limitations
The study cannot prove a causal mechanism for why the participants with autism struggle with these language tasks, as the design is purely observational and comparative. It also does not represent the full, highly diverse autism spectrum, as the sample of youth with autism was small and did not include individuals classified as low-functioning with low intelligence scores. Finally, because the syntactic language-impaired comparison groups were drawn from different historical datasets rather than being tested simultaneously alongside the group with autism, subtle differences in testing environments cannot be completely ruled out.
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