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Brief Report: Concurrent Validity of the Leiter-R and KBIT-2 Scales of Nonverbal Intelligence for Children with Autism and Language Impairments

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Abstract

The concurrent validity of the KBIT-2 Nonverbal IQ and Leiter-R Brief IQ was evaluated for two groups of children: those with high functioning autism and those with language impairments without autism. Fifty-three children between the ages of 4 and 13 years of age participated in the study. The correlation between the scales was large (r = .62) and no statistical difference was found between the means. However, large intraindividual differences were found for 11 children who received scores at least 10 points higher on the Leiter-R Brief IQ, 5 of those scored beyond 20 points higher than nonverbal scores on the KBIT-2. Conversely, 11 children scored at least 10 points higher on the KBIT-2 than on the Leiter-R with 4 of those scoring 20 points higher. These findings highlight the importance of using multiple measures when assessing individuals with autism or language disorders.

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Authors and Affiliations

  1. Department of Pediatrics, University of Mississippi Medical Center, 2500 N. State Street, Jackson, MS, 39216, USA

    Dorothy Scattone & Donald J. Raggio

  2. Department of Preventive Medicine, University of Mississippi Medical Center, Jackson, MS, USA

    Warren May

Authors
  1. Dorothy Scattone
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  2. Donald J. Raggio
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  3. Warren May
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Correspondence to Dorothy Scattone.

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Scattone, D., Raggio, D.J. & May, W. Brief Report: Concurrent Validity of the Leiter-R and KBIT-2 Scales of Nonverbal Intelligence for Children with Autism and Language Impairments. J Autism Dev Disord 42, 2486–2490 (2012). https://doi.org/10.1007/s10803-012-1495-y

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  • DOI: https://doi.org/10.1007/s10803-012-1495-y

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