Stability and Change in the Cognitive and Adaptive Behaviour Scores of Preschoolers with Autism Spectrum Disorder

Helen E. Flanagan; Isabel M. Smith; Tracy Vaillancourt; Eric Duku; Peter Szatmari; Susan Bryson; Eric Fombonne; Pat Mirenda; Wendy Roberts; Joanne Volden; Charlotte Waddell; Lonnie Zwaigenbaum; Teresa Bennett; Mayada Elsabbagh; Stelios Georgiades

doi:10.1007/s10803-015-2433-6

Stability and Change in the Cognitive and Adaptive Behaviour Scores of Preschoolers with Autism Spectrum Disorder

Helen E. Flanagan, Isabel M. Smith, Tracy Vaillancourt, Eric Duku, Peter Szatmari, Susan Bryson, Eric Fombonne, Pat Mirenda, Wendy Roberts, Joanne Volden, Charlotte Waddell, Lonnie Zwaigenbaum, Teresa Bennett, Mayada Elsabbagh, Stelios Georgiades

Pediatrics

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

We examined the stability of cognitive and adaptive behaviour standard scores in children with autism spectrum disorder (ASD) between diagnosis and school entry approximately age 6. IQ increased 18 points in 2-year-olds, 12 points in 3-year-olds, and 9 points in 4-year-olds (N = 281). Adaptive behaviour scores increased 4 points across age groups (N = 289). At school entry, 24 % of children met criteria for intellectual disability (cognitive and adaptive behaviour scores <70). No children with both scores ≥70 at diagnosis later met criteria for intellectual disability. Outcomes were more variable for children with initial delays in both areas (in 57 %, both scores remained <70). Findings are relevant to clinical decision-making, including specification of intellectual disability in young children with ASD.

Original language	English (US)
Pages (from-to)	2691-2703
Number of pages	13
Journal	Journal of autism and developmental disorders
Volume	45
Issue number	9
DOIs	https://doi.org/10.1007/s10803-015-2433-6
State	Published - Sep 1 2015

Keywords

Adaptive behaviour
Assessment
Cognitive skills
DSM 5 specifiers
Diagnosis
Preschoolers

ASJC Scopus subject areas

Developmental and Educational Psychology

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10.1007/s10803-015-2433-6

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Flanagan, H. E., Smith, I. M., Vaillancourt, T., Duku, E., Szatmari, P., Bryson, S., Fombonne, E., Mirenda, P., Roberts, W., Volden, J., Waddell, C., Zwaigenbaum, L., Bennett, T., Elsabbagh, M., & Georgiades, S. (2015). Stability and Change in the Cognitive and Adaptive Behaviour Scores of Preschoolers with Autism Spectrum Disorder. Journal of autism and developmental disorders, 45(9), 2691-2703. https://doi.org/10.1007/s10803-015-2433-6

Flanagan, HE, Smith, IM, Vaillancourt, T, Duku, E, Szatmari, P, Bryson, S, Fombonne, E, Mirenda, P, Roberts, W, Volden, J, Waddell, C, Zwaigenbaum, L, Bennett, T, Elsabbagh, M & Georgiades, S 2015, 'Stability and Change in the Cognitive and Adaptive Behaviour Scores of Preschoolers with Autism Spectrum Disorder', Journal of autism and developmental disorders, vol. 45, no. 9, pp. 2691-2703. https://doi.org/10.1007/s10803-015-2433-6

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Stability and Change in the Cognitive and Adaptive Behaviour Scores of Preschoolers with Autism Spectrum Disorder

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