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Early categorization abilities in young children with Williams syndrome

Examined the object categorization abilities of children with Williams syndrome using either visual or verbal information. 12 children (aged 2.8-6.8 yrs) diagnosed with Williams syndrome were presented with 6 triads of objects. In each triad, 2 objects either shared visual properties or were given the same name. Following the presentation of each triad, categorization based on the shared visual or verbal property was evaluated through object manipulation. Results show that subjects (Ss) were able to categorize the objects according to visual cues, but not verbal ones. These findings contrasted with those of a previous study employing normal developing control Ss who were much younger and much less advanced in their vocabulary development. It is concluded that vocabulary acquisition in Williams syndrome develops atypically. (PsycINFO Database Record (c) 2005 APA, all rights reserved)



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