This systematic review and meta-analysis evaluated the effectiveness of telehealth social communication intervention on language skills of children with autism spectrum disorder (ASD). Twenty-one studies were included, among which 17 were single subject experimental design (SSED). Language outcomes were categorized into five linguistic domains (phonology, morphology, syntax, semantics, and pragmatics), and meta-analysis was planned for each domain. Meta-analysis was only performed for pragmatic outcomes, due to the small number of studies that included outcomes in other domains. The results showed significant pre- to post-intervention improvement, thus supporting the use of telehealth social communication intervention to improve pragmatic skills among children with ASD. More diverse measures should be used to target linguistic domains beyond pragmatics. The predominant use of SSED warrants large-scale studies for robust evidence in the future.
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