Journal
AJIDD-AMERICAN JOURNAL ON INTELLECTUAL AND DEVELOPMENTAL DISABILITIES
Volume 125, Issue 3, Pages 155-169Publisher
AMER ASSOC INTELLECTUAL DEVELOPMENTAL DISABILITIES
DOI: 10.1352/1944-7558-125.3.155
Keywords
adaptive behavior; autism spectrum disorder; developmental trajectory
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Funding
- U.S. National Institutes of Health [T32HD040127]
- U.S. National Institute of Child Health and Human Development grant, The Collaborative Programs of Excellence in Autism [HD3S468]
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Longitudinal growth modeling was utilized to examine adaptive behavior over eight years across the three time points (i.e., ages 2-10). Seventy-six parents completed the Vineland Adaptive Behavior Scales interviews of adaptive behavior. Child participants completed standardized developmental testing and an executive function task in toddlerhood and the Autism Diagnostic Observation Schedule across all time points. Growth models were specified for communication, daily living skills, and socialization domains of adaptive behavior. Mental age in toddlerhood was a significant predictor of trajectories of communication, daily living skills, and socialization. Executive function and autism severity were significant predictors of socialization. Findings suggest executive function as a potential target for promoting the growth of adaptive behavior skills in addition to autism symptomology.
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