Predictors and correlates of adaptive functioning in children with developmental disorders.
IQ scores hide real daily-living gaps in autism; check adaptive skills and target language for high-IQ kids and basic self-care for low-IQ kids.
01Research in Context
What this study did
Richman et al. (2001) compared kids with autism to kids without autism who had the same IQ.
They looked at everyday skills like brushing teeth, making friends, and using money.
All children were in late elementary school. The team wanted to know why some kids needed more help in daily life even when their IQ scores looked alike.
What they found
Children with autism scored much lower on daily living and social skills.
For higher-IQ kids with autism, poor language and strong autistic traits held them back.
For lower-IQ kids with autism, low IQ itself was the main limit.
How this fits with other research
Hogg et al. (1995) saw the same pattern six years earlier: rising IQ helped typical kids more than it helped kids with autism.
Amore et al. (2011) later tested over 1,000 verbal youth and found the gap stayed even after they removed autism severity from the math, proving the gap is real.
Chang et al. (2013) repeated the study in Taiwan and got the same social-skills weakness, showing the problem crosses cultures.
Clarke et al. (2025) followed kids into adulthood and showed the split keeps going: personal care matters most for lower-IQ youth, community skills matter for higher-IQ youth.
Why it matters
Stop using IQ alone to plan goals. A bright child with autism may still need step-by-step teaching to shower or join a game. A lower-IQ child may first need basic self-care before job tasks. Always run an adaptive test, then write goals that match the child’s IQ band.
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02At a glance
03Original abstract
Autism is a developmental disorder marked by impairments in socialization, communication, and perseverative behavior and is associated with cognitive impairment and deficits in adaptive functioning. Research has consistently demonstrated that children with autism have deficits in adaptive functioning more severe than their cognitive deficits. This study investigates the correlates and predictors of adaptive functioning as measured by the Vineland Adaptive Behavior Scales in high- and low-functioning children with autism and their age and nonverbal IQ matched controls. Thirty-five 9-year-old children with high-functioning autism (HAD) were compared with 31 age-matched children with developmental language disorder (DLD), and 40 9-year-old children with low-functioning autism (LAD) were compared with 17 age-matched children with low IQ on adaptive functioning, IQ, autistic symptomology, and tests of language and verbal memory. Results indicate that both groups with autism were significantly impaired compared to their matched controls on Socialization and Daily Living, but not Communication and that these impairments were more pronounced in the HAD group than in the LAD group. Adaptive behavior was strongly correlated with autistic symptomology only in the HAD group. Regression analyses indicated that IQ was strongly predictive of adaptive behavior in both low-functioning groups, but tests of language and verbal memory predicted adaptive behavior in the higher functioning groups. Results suggest that IQ may act as a limiting factor for lower functioning children but higher functioning children are impaired by specific deficits, including autistic symptomology and impaired language and verbal memory.
Journal of autism and developmental disorders, 2001 · doi:10.1023/a:1010707417274