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 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 (<italic>r</italic> = 0.89; <italic>r²</italic> = 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. <bold><italic>Autism Res</italic></bold><italic>2018, 11: 503–508</italic>. © 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. [ABSTRACT FROM AUTHOR]