The study aims to explore the efficacy of play therapy in enhancing vocabulary in children diagnosed with Autism. The objectives were to evaluate the improvement of vocabulary through play therapy for trained and untrained sets of words through a multiple case study approach. The study included three children between 3 and 5 years, and receptive and expressive ages of 2–3 years. The efficacy of the therapy was evaluated using pre- and post-therapy language and vocabulary assessments for the set of words selected. The study results showed a substantial improvement in vocabulary size in all three children. The study also draws attention to the improvements noted in each child's sensory skills and other behaviors in detail. Findings from this study contribute valuable insights into the role of play therapy as an effective tool for improving vocabulary in children diagnosed with Autism, offering implications for therapeutic practices and further research in the field.
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