ABAS-II Adaptive Profiles and Correlates in Samples of Children with HFASD or LFASD

This study was conducted to extend the research on the adaptive skills of 55 high-functioning children with autism spectrum disorder (HFASD) and 55 children with ASD and co-occurring intellectual disability (LFASD), ages 6–12, using the Adaptive Behavior Assessment System, Second Edition (ABAS-II). This study examined each group’s adaptive profile, compared adaptive functioning and cognitive ability, and assessed correlates (i.e., age, IQ) of adaptive skills. Results indicated children with HFASD demonstrated cognitive strengths and adaptive deficits, while children with LFASD demonstrated adaptive strengths in the areas of social and conceptual skills, and practical skills commensurate with estimated cognitive ability. Within the HFASD sample, age significantly, negatively correlated with adaptive social ability, while IQ was not significantly correlated with adaptive behavior. Conversely, in the LFASD sample, age did not correlate with adaptive ability, although IQ was significantly related to overall adaptive ability and all domains of the ABAS-II.