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Mean DAS-II GCA and VABS-II ABC standard scores: A DAS-II early years and school age GCA scores; B VABS-II ABC scores. ABC Adaptive Behavior Composite; CI confidence interval; DAS-II Differential Ability Scales, second edition; EY early years (2 years 6 months–6 years 11 months); GCA General Conceptual Ability; SA school age (7 years–17 years 11 months); VABS-II Vineland Adaptive Behavior Scales, second edition
