Journal of Autism and Developmental Disorders

, Volume 46, Issue 5, pp 1582–1589

Does WISC-IV Underestimate the Intelligence of Autistic Children?

  • Anne-Marie Nader
  • Valérie Courchesne
  • Michelle Dawson
  • Isabelle Soulières
Perception In Autism

DOI: 10.1007/s10803-014-2270-z

Cite this article as:
Nader, AM., Courchesne, V., Dawson, M. et al. J Autism Dev Disord (2016) 46: 1582. doi:10.1007/s10803-014-2270-z

Abstract

Wechsler Intelligence Scale for Children (WISC) is widely used to estimate autistic intelligence (Joseph in The neuropsychology of autism. Oxford University Press, Oxford, 2011; Goldstein et al. in Assessment of autism spectrum disorders. Guilford Press, New York, 2008; Mottron in J Autism Dev Disord 34(1):19–27, 2004). However, previous studies suggest that while WISC-III and Raven’s Progressive Matrices (RPM) provide similar estimates of non-autistic intelligence, autistic children perform significantly better on RPM (Dawson et al. in Psychol Sci 18(8):657–662, doi:10.1111/j.1467-9280.2007.01954.x, 2007). The latest WISC version introduces substantial changes in subtests and index scores; thus, we asked whether WISC-IV still underestimates autistic intelligence. Twenty-five autistic and 22 typical children completed WISC-IV and RPM. Autistic children’s RPM scores were significantly higher than their WISC-IV FSIQ, but there was no significant difference in typical children. Further, autistic children showed a distinctively uneven WISC-IV index profile, with a “peak” in the new Perceptual Reasoning Index. In spite of major changes, WISC-IV FSIQ continues to underestimate autistic intelligence.

Keywords

Autism Children Intelligence Wechsler scales Raven’s progressive matrices Abstract reasoning 

Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Anne-Marie Nader
    • 1
    • 2
  • Valérie Courchesne
    • 1
    • 2
    • 3
  • Michelle Dawson
    • 1
  • Isabelle Soulières
    • 1
    • 2
  1. 1.Rivière-des-prairies HospitalCentre d’Excellence en Troubles Envahissants du Développement de l’Université de Montréal (CETEDUM)MontrealCanada
  2. 2.Psychology DepartmentUniversity of Quebec at MontrealMontrealCanada
  3. 3.Psychology DepartmentUniversity of MontrealMontrealCanada

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