Abstract
Vocabulary performance of children up to 36 months of age with Down syndrome
Highlights
Down Syndrome (DS) is a genetic alteration that is characterized by the trisomy of chromosome number 21, generated from an abnormal cell division, leading to numerous alterations in the organism that may impact on the neuropsychomotor development, cardiac system, stomatognathic system, hearing and vision[1]
Based on the application of the vocabulary list of the MacArthur-Bates Communicative Development Inventory, it was found that the means of “understanding” of the items of all semantic categories were higher than the means of “understanding and expression”
The “action words” section had the highest level of understanding by the participants, while the “people” section was the one that children with DS understood and spoke the most (Table 1)
Summary
Down Syndrome (DS) is a genetic alteration that is characterized by the trisomy of chromosome number 21, generated from an abnormal cell division, leading to numerous alterations in the organism that may impact on the neuropsychomotor development, cardiac system, stomatognathic system, hearing and vision[1]. There is a delay in global development, including language skills, in children with DS when compared to children with typical development (TD)[2,3,4,5] This global delay can be seen in tests for the evaluation and monitoring of child development, which report a performance below the expected for the child’s chronological age (CI) in multiple skills, such as sensory, motor, cognitive and linguistic skills. Concerning language development, this population shows a better performance in comprehension than in expression, with some aspects of receptive skills, such as vocabulary recognition, proportional to non-verbal cognitive ability levels[2,3,4,5,6]. There is evidence that lexical performance of children with DS, both receptive and expressive, is lower than the performance of children with TD with the same mental age[7]
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