VABS-II Ratings and Predictors of Adaptive Behavior in Children with HFASD

This study was conducted to extend the research on the adaptive skills of high-functioning children with autism spectrum disorder (HFASD) using the Vineland Adaptive Behavior Scales, Second Edition (VABS-II). Specifically, this study (a) examined the VABS-II adaptive profile, (b) compared adaptive functioning and cognitive ability, and (c) assessed predictors (age, IQ, ASD symptomatology) of adaptive skills of 71 children, ages 7 to 12 years, with HFASD. Results of normative comparisons indicated significant adaptive deficits on the Adaptive Behavior Composite and all three VABS-II domains (Communication, Daily Living Skills [DLS], and Socialization). Similarly, results revealed that the adaptive functioning of the sample fell significantly below their cognitive level. Regression analyses indicated that age was a significant inverse predictor of adaptive communication and socialization skills and IQ was a significant positive predictor of Communication and DLS. After accounting for age and IQ, ASD-social and ASD-communication symptoms did not predict adaptive behaviors; however ASD-restricted and repetitive symptoms was a significant inverse predictor of adaptive socialization skills.