ArticlemedRxiv : the preprint server for health sciences2025
Language impairment in autistic adolescents and young adults: Variability by definition.
Article in medRxiv : the preprint server for health sciences, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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3 authors.
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Abstract
Purpose: Though co-occurring structural language impairment (LI) in autism is common and predicts long-term outcomes, little is known about LI in autism beyond childhood. One challenge to closing this gap is that there is no consensus definition of LI. This study focuses on LI in autistic adolescents and young adults, asking to what extent clinical classification differs by definition and examining performance across language measures, nonverbal intelligence (NVIQ), and autism traits. Method: Participants ( Results: More stringent definitions yielded a greater proportion of participants meeting LI criteria, and more stringent cutoffs for LI yielded greater overall consistency in clinical classification across individual language measures, but there was no one-to-one ratio between cutoff and clinical classification. Clustering indicated three profiles differentiated on the basis of language and nonverbal cognitive skills, but each cluster was heterogeneous. Individual performance also varied across language measures. Discussion: Findings support multi-domain approaches to characterizing language skills in autistic adolescents and adults, including those with LI. Future work is needed to understand language skills in autism beyond childhood and how to develop effective assessment practices.
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