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Longitudinal assessment of intellectual abilities of children with Williams syndrome: multilevel modeling of performance on the Kaufman Brief Intelligence Test-Second Edition.
- Source :
-
American journal on intellectual and developmental disabilities [Am J Intellect Dev Disabil] 2012 Mar; Vol. 117 (2), pp. 134-55. - Publication Year :
- 2012
-
Abstract
- Multilevel modeling was used to address the longitudinal stability of standard scores (SSs) measuring intellectual ability for children with Williams syndrome (WS). Participants were 40 children with genetically confirmed WS who completed the Kaufman Brief Intelligence Test-Second Edition (KBIT-2; A. S. Kaufman & N. L. Kaufman, 2004 ) 4-7 times over a mean of 5.06 years. Mean age at first assessment was 7.44 years (range = 4.00-13.97 years). On average, KBIT-2 Composite IQ, Verbal SS, and Nonverbal SS were stable from 4 to 17 years, although there were significant individual differences in intercept (Composite IQ, Verbal SS, Nonverbal SS) and slope (Composite IQ, Nonverbal SS). Maternal education was significantly related to Verbal SS intercept. No significant sex differences were found. Implications for studies of genotype/phenotype correlations in WS are discussed.
- Subjects :
- Adolescent
Child
Child, Preschool
Female
Humans
Intellectual Disability psychology
Longitudinal Studies
Male
Nonverbal Communication
Predictive Value of Tests
Verbal Learning
Williams Syndrome psychology
Intellectual Disability diagnosis
Intellectual Disability epidemiology
Intelligence Tests statistics & numerical data
Models, Psychological
Williams Syndrome diagnosis
Williams Syndrome epidemiology
Subjects
Details
- Language :
- English
- ISSN :
- 1944-7515
- Volume :
- 117
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- American journal on intellectual and developmental disabilities
- Publication Type :
- Academic Journal
- Accession number :
- 22515828
- Full Text :
- https://doi.org/10.1352/1944-7558-117.2.134