Abstract
This paper charted the cognitive and behavioural profiles from toddlerhood to middle childhood in 48 children diagnosed with ASD at 24-months. The Mullen Scales of Early Learning (MSEL) was administered at 24- and 48-months and the Wechsler Abbreviated Scale of Intelligence (WASI) at school age. Autism severity was derived using The Autism Diagnostic Observation Schedule (ADOS) Results: Developmental Disability/Intellectual Disability (DD/ID; Developmental Quotient <70) reduced from 64% at 24-months to 8% at outcome. Seventy-three percent of children continued to meet ADOS cut-off at school age. Conclusion: Diagnoses at 24-months, appear to be reliable and stable. Further research is needed to investigate whether early identification, which provides more opportunity to access early intervention, may in turn facilitate cognitive development over time.
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This research was not funded. Special acknowledgements to the families involved in the study and to the second and third authors for their guidance, support and contribution to this research project.
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Megan L. E. Clark, Josephine Barbaro and Cheryl Dissanayake declare a potential conflict of interest with Dr Giacamo Vivanti who was formally affiliated with the Olga Tennison Autism Research Centre.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This article does not contain any studies with animals performed by any of the authors.
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Clark, M.L.E., Barbaro, J. & Dissanayake, C. Continuity and Change in Cognition and Autism Severity from Toddlerhood to School Age. J Autism Dev Disord 47, 328–339 (2017). https://doi.org/10.1007/s10803-016-2954-7
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DOI: https://doi.org/10.1007/s10803-016-2954-7