A longitudinal assessment of diverging verbal and non-verbal abilities in the Williams syndrome phenotype
C Jarrold1, A D Baddeley, A K Hewes
1Centre for the Study of Memory and Learning, Department of Experimental Psychology, University of Bristol, UK. C.Jarrold@bristol.ac.uk
Abstract:
Jarrold et al. (1998) presented evidence to suggest that verbal and non-verbal abilities develop at different rates in individuals with the Williams syndrome phenotype. However, this evidence was derived from cross-sectional rather than longitudinal data. The current report presents data from a series of follow up assessments which examine the development of vocabulary and pattern construction abilities in 15 of the original sample of 16 individuals, over a 40 month period. The results confirm the original predictions, as mental age equivalent scores for vocabulary increase more rapidly than scores for the pattern construction test; a finding, which appears unlikely to be due to practice effects.
Related Concept Videos
Language and Cognition
Wechsler's Contribution to Measures of Intelligence
Autism Spectrum Disorder
These core symptoms manifest differently among individuals, ranging from mild to severe. The disorder's complexity extends beyond its clinical presentation, encompassing a diverse range of biological, cognitive, and sociocultural influences.
Learning Disabilities
Dyslexia
Dyslexia is a...


