Utility of an abbreviated version of the stanford-binet intelligence scales (5th ed.) in estimating 'full scale' IQ for young children with autism spectrum disorder.
The short Stanford-Binet is handy, but it over-estimates IQ in one of every six autistic preschoolers, so always double-check before big placement choices.
01Research in Context
What this study did
Twomey et al. (2018) asked if the short form of the Stanford-Binet IQ test gives the same answer as the full form in preschoolers with autism.
They gave both versions to the same kids and looked at how close the scores were.
What they found
The short test usually matched the long test, but it bumped the score too high in about one out of every six children.
That means a child could look brighter on paper than they really are.
How this fits with other research
Nader et al. (2016) and Wormald et al. (2019) saw the opposite problem: the WISC-IV gave autistic kids lower scores than other IQ tests. Conal’s team shows a short test can also overshoot.
McGonigle-Chalmers et al. (2013) blamed strict timing for the low WISC scores. The new data say format, not just time, can tilt the result either way.
Peristeri et al. (2024) tracked the same age group for four years and found IQ paths split widely. A single short score may lock a child into the wrong class or service.
Why it matters
If you use the abbreviated Stanford-Binet to place a preschooler with autism, treat the number as a rough guide, not a fact. One in six kids will look smarter than they are. Pair the score with parent report, language samples, and play probes before you decide on classroom level or service hours. When the number feels off, reach for a fuller battery or a non-verbal tool like the Leiter-3.
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02At a glance
03Original abstract
UNLABELLED: The fifth edition of the Stanford-Binet Intelligence scales allows 'full scale' IQ (FSIQ) to be estimated using an abridged version of the test-the abbreviated battery IQ (ABIQ). Set within a public early intervention team service, the current cross-sectional study investigated the utility of the ABIQ in estimating FSIQ for 40 children with autism spectrum disorder (ASD) aged 3-5 years. A strong ABIQ-FSIQ association was yielded (r = 0.89; r2 = 0.808) and the ABIQ did not over-estimate mean FSIQ above a clinically-relevant threshold; however, clinically significant over-estimation occurred in 17.5% of individual cases. While the findings provide support for the utility of the ABIQ in estimating FSIQ for young children with ASD, caution relating to the over-estimation of FSIQ is warranted. Careful clinical judgment-ideally based on examination of previous cognitive assessment results (if available), thorough interactional observations, and close multi-disciplinary consultation-is necessary to determine the applicability of the ABIQ to individual cases. Autism Res 2018, 11: 503-508. © 2017 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: We investigated the utility of a shortened version of the Stanford-Binet Intelligence Scales in estimating IQ for 40 young children with autism spectrum disorder (ASD). The findings provide qualified support for the instrument: acceptably accurate IQ estimation was achieved for most cases; but not so for a sizeable minority (17.5%). Careful clinical judgment is necessary to determine the applicability of the ABIQ to individual cases.
Autism research : official journal of the International Society for Autism Research, 2018 · doi:10.1002/aur.1911