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J Autism Dev Disord. 2011 Aug;41(8):1007-18. doi: 10.1007/s10803-010-1126-4.

The role of adaptive behavior in autism spectrum disorders: implications for functional outcome.

Author information

1
Department of Health Psychology, University of Missouri-Columbia, Thompson Center for Autism and Neurodevelopmental Disorders, 205 Portland Street, Columbia, MO 65211, USA. kannest@missouri.edu

Abstract

The relationship between adaptive functioning and autism symptomatology was examined in 1,089 verbal youths with ASD examining results on Vineland-II, IQ, and measures of ASD severity. Strong positive relationships were found between Vineland subscales and IQ. Vineland Composite was negatively associated with age. IQ accounted a significant amount of the variance in overall adaptive skills (55%) beyond age and ASD severity. Individuals with ASD demonstrated significant adaptive deficits and negligible associations were found between the level of autism symptomatology and adaptive behavior. The results indicate that IQ is a strong predictor of adaptive behavior, the gap between IQ and adaptive impairments decreases in lower functioning individuals with ASD, and older individuals have a greater gap between IQ and adaptive skills.

PMID:
21042872
DOI:
10.1007/s10803-010-1126-4
[Indexed for MEDLINE]

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