Shelley L. Velleman

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In order to describe the physical characteristics, medical complications, and natural history of classic 7q11.23 duplication syndrome [hereafter Dup7 (MIM 609757)], reciprocal duplication of the region deleted in Williams syndrome [hereafter WS (MIM 194050)], we systematically evaluated 53 individuals aged 1.25-21.25 years and 11 affected adult relatives(More)
Advances in psycholinguistics have identified cognitive mechanisms that may account for the phenomena of whole-word phonology and phonological templates in normally developing children. Deficits in these same mechanisms may also account for certain types of disordered phonologies. In this paper, these cognitive mechanisms are described, strategies for(More)
To begin to delineate the psychological characteristics associated with classic 7q11.23 duplication syndrome (duplication of the classic Williams syndrome region; hereafter classic Dup7), we tested 63 children with classic Dup7 aged 4-17 years. Sixteen toddlers aged 18-45 months with classic Dup7 and 12 adults identified by cascade testing also were(More)
Williams syndrome (WS) is a rare genetic disorder characterized by heart disease, failure to thrive, hearing loss, intellectual or learning disability, speech and language delay, gregariousness, and non-social anxiety. The WS psycholinguistic profile is complex, including relative strengths in concrete vocabulary, phonological processing, and verbal(More)
Approaches to the treatment of developmental verbal dyspraxia based upon current theories about phonological development are explored. The author presents the concept of "bridging"; for example, making the transition from one sound to another or from one word to the next, as a reflection of the child's ability to generate hierarchical linguistic structures.(More)
Previous studies have shown that metrical analysis accounts for syllable omissions in young normally developing children better than prior perspectives. This approach has not yet been applied to children with disorders. Inappropriate sentential stress has been proposed as a diagnostic marker for a subgroup of children with suspected developmental apraxia of(More)
7q11.23 duplication syndrome is a recently-documented genetic disorder associated with severe speech delay, language delay, a characteristic facies, hypotonia, developmental delay, and social anxiety. Developmentally appropriate nonverbal pragmatic abilities are demonstrated in socially comfortable situations. Motor speech disorder (Childhood Apraxia of(More)
Words derive their structure not only from the sounds they include but also from the organization of those sounds within the word. This organization is the phonotactic level of the word: roughly, its shape including the sequence of its elements. Often, children with immature or disordered phonologies demonstrate phonotactic as well as phonetic limitations.(More)
This paper provides two arguments that constraint-based grammars should not be learned by directly mirroring the frequency of constraint violation and satisfaction in the target words of a language. The first argument comes from a class of stages attested in phonological development, called Intermediate Faith (IF) stages, in which children produce marked(More)