Effects of age and IQ on adaptive behavior domains for children with autism.
Higher IQ does not guarantee better daily living or social skills in kids with autism, so teach those skills directly.
01Research in Context
What this study did
The team looked at kids with autism and kids with mental retardation. They asked: does a higher IQ help daily living and social skills grow faster?
They tracked the same children over time. They used standard IQ tests and the Vineland Adaptive Behavior Scales.
What they found
For kids with autism, a higher IQ was linked to smaller gains in socialization and daily living skills. The opposite was true for kids with mental retardation.
In plain words, rising IQ did not translate into better real-world skills for the autism group.
How this fits with other research
Richman et al. (2001) saw the same pattern: autistic children scored lower on adaptive skills than IQ-matched peers. They added that social-communication symptoms, not IQ, drive the gap.
Amore et al. (2011) repeated the warning with 1,089 verbal youth. IQ explained only half of adaptive variance; big deficits stayed.
Chang et al. (2013) and Wang et al. (2024) show the gap is global. High-IQ Taiwanese kids and preschoolers in China still lag in daily living skills.
Clarke et al. (2025) flip the lens forward: childhood daily-living skills predict adult life quality, so the early gap matters long-term.
Why it matters
Do not trust IQ scores to tell you how a child with autism will dress, shop, or make friends. Write explicit adaptive goals in every plan. Teach the skill itself, not the concept. Track Vineland or ABAS items side-by-side with cognitive tests so you catch the gap early and adjust teaching before bad habits set in.
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02At a glance
03Original abstract
Researchers have examined adaptive behavior in autism, but few studies have looked for different patterns of adaptive skills according to age and intelligence. Domain scores from the Vineland Adaptive Behavior Scale (VABS) were compared in relation to age and Performance IQ for 72 children and adolescents with autism and 37 nonautistic children and adolescents with mental retardation. Age and IQ were positively related to each of the Vineland domains. Children with autism had lower scores in the socialization domain. An interaction was present between Performance IQ and group: With increasing IQ, children with autism showed smaller increases in social functioning than children with mental retardation. A similar trend was present for daily living skills. Results suggest that (a) the relationship between the two groups' adaptive behavior profiles is stable from preschool age through adolescence, and (b) increasing IQ is associated with less of an increase in certain adaptive skills for children with autism.
Journal of autism and developmental disorders, 1995 · doi:10.1007/BF02178167