Assessment & Research

Revisiting cognitive and adaptive functioning in children and adolescents with autism spectrum disorder.

Matthews et al. (2015) · Journal of autism and developmental disorders 2015
★ The Verdict

Expect higher IQ than adaptive scores in youth with ASD—plan to teach life skills either way.

✓ Read this if BCBAs writing assessment reports or adaptive goals for school-aged clients.
✗ Skip if Clinicians who only run early-intensity DTT and never touch adaptive goals.

01Research in Context

01

What this study did

Ohan et al. (2015) looked at kids and teens with autism. They gave IQ tests and the Vineland Adaptive Behavior Scales. They wanted to see if thinking scores matched daily-living scores.

The team checked youth both with and without intellectual disability. They used a simple case-series design. No fancy tricks—just side-by-side numbers.

02

What they found

Thinking scores were higher than adaptive scores in most kids. The gap was biggest for older children who did not have ID.

The classic “VABS autism profile” did not show up. In other words, the old rule that adaptive always lags far behind IQ did not hold for everyone.

03

How this fits with other research

Fujiura et al. (2018) extends these numbers by watching the same kids over time. They found adaptive gains stop in the teen years, so the gap you see at ten may stay at sixteen.

Rosa et al. (2017) adds detail: weak verbal and working-memory scores link to lower daily skills. Together the papers say, “Yes, the gap is real, and memory matters.”

Greene et al. (2019) warns that teachers rate adaptive skills higher than parents. So the size of the gap can look smaller at school than at home—check both reporters before you write goals.

04

Why it matters

When you see a bright child with autism who still cannot make a sandwich, do not assume laziness. Expect thinking and adaptive scores to differ, especially in higher-IQ kids. Use that gap to justify direct teaching of daily living, social, and safety skills even when classroom work is on grade level.

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Pull last year’s Vineland and IQ scores—if the standard scores differ by more than 15 points, add two daily-living goals to the next IEP.

02At a glance

Intervention
not applicable
Design
case series
Sample size
73
Population
autism spectrum disorder
Finding
not reported

03Original abstract

Profiles of performance on the Stanford Binet Intelligence Scales (SB5) and Vineland Adaptive Behavior Scales (VABS) were examined in 73 children and adolescents with autism spectrum disorder. SB5 cognitive profiles were observed to be similar between participants with and without early language delay, but different between participants with and without intellectual disability. With few exceptions, the distribution and cognitive profiles of participants with specific nonverbal IQ-verbal IQ and abbreviated IQ-full scale IQ discrepancy patterns paralleled previous reports. A cognitive functioning advantage over adaptive functioning was observed to be strongest in participants without intellectual disability and older participants. The previously reported VABS "autism profile" was not observed. Current findings clarify previous research and will inform the diagnostic process and treatment planning.

Journal of autism and developmental disorders, 2015 · doi:10.1007/s10803-014-2200-0