Abstract
We examined whether clinically distinct subgroups can be derived from a sample of toddlers (n = 186) who failed the Modified Checklist for Autism in Toddlers, received a comprehensive clinical evaluation, and were diagnosed with an autism spectrum disorder (ASD). Three subgroups emerged from cluster analysis distinguished by (a) social, communication, and intellectual skills and (b) the rate and intensity of repetitive behaviors and abnormal sensory response. Preoccupations, compulsions, and rituals did not distinguish resultant subgroups. These results support a dimensional diagnostic view of ASDs in toddlers since subgroup differences were based on symptom severity rather than different symptom profiles. Results also identify specific types and levels of behavioral deficit relevant to toddler populations. Implications for early diagnosis are discussed.
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Acknowledgments
We would like to acknowledge the early screening study teams at the University of Connecticut, under the direction of Dr. Deborah Fein, and Georgia State University, under the direction of Dr. Diana L. Robins. We would also like to acknowledge the children and families who participated in this research.
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Wiggins, L.D., Robins, D.L., Adamson, L.B. et al. Support for a Dimensional View of Autism Spectrum Disorders in Toddlers. J Autism Dev Disord 42, 191–200 (2012). https://doi.org/10.1007/s10803-011-1230-0
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DOI: https://doi.org/10.1007/s10803-011-1230-0