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J Autism Dev Disord. 2016 May;46(5):1582-9. doi: 10.1007/s10803-014-2270-z.

Does WISC-IV Underestimate the Intelligence of Autistic Children?

Author information

1
Rivière-des-prairies Hospital, Centre d'Excellence en Troubles Envahissants du Développement de l'Université de Montréal (CETEDUM), 7070 Blvd Perras, Montreal, QC, H1E 1A4, Canada.
2
Psychology Department, University of Quebec at Montreal, C.P. 8888, succursale Centre-Ville, Montreal, H3C 3P8, Canada.
3
Psychology Department, University of Montreal, C.P. 6128, succursale Centre-ville, Montreal, H3C 3J7, Canada.
4
Rivière-des-prairies Hospital, Centre d'Excellence en Troubles Envahissants du Développement de l'Université de Montréal (CETEDUM), 7070 Blvd Perras, Montreal, QC, H1E 1A4, Canada. soulieres.isabelle@uqam.ca.
5
Psychology Department, University of Quebec at Montreal, C.P. 8888, succursale Centre-Ville, Montreal, H3C 3P8, Canada. soulieres.isabelle@uqam.ca.

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:

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

PMID:
25308198
DOI:
10.1007/s10803-014-2270-z
[Indexed for MEDLINE]

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