Definition
Regression is the loss of previously acquired skills. In a developmental context, a child is considered to have regressed when there is evidence that he/she has lost a definitely acquired skill that was previously used regularly for some time. The Autism Diagnostic Interview-Revised (ADI-R) requires skills previously acquired and subsequently lost for at least a period of 3 months. Regression in ASD has been relatively poorly defined and has mainly been studied using retrospective parental reports after the individual has received an autism spectrum disorder (ASD) diagnosis. In her review, Rogers defined autistic regression as “loss of previously acquired language and social relatedness skills during the first 3 years of life” (Rogers, 2004). Parr et al. (2011) recently used the term “early developmental regression” in the study of regression before age 3 years. In ASD, the most commonly reported regression is the loss of use of words or phrases, or developing language....
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Parr, J., Le Couteur, A.S. (2013). Regression. In: Volkmar, F.R. (eds) Encyclopedia of Autism Spectrum Disorders. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-1698-3_1582
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DOI: https://doi.org/10.1007/978-1-4419-1698-3_1582
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