S.R.J.M. Deckers

Communication performance of children with Down Syndrome: An ICF-CY based multiple case study

Enhancing communication performance skills may help children with Down Syndrome (DS) to expand their opportunities for participation in daily life. It is a clinical challenge for speech-language pathologists (SLP) to disentangle various mechanisms that contribute to the language and communication problems that children with DS encounter. Without clarity of different levels of functioning, appropriate interventions may be poorly conceived or improperly implemented. In the present study, the International Classification of Functioning, Disability and Health – Children and Youth Version (ICF-CY) framework was used to classify contributing factors to communication performance in a multiple case study of six young children with DS. Within a comprehensive assessment, we identified individual and environmental facilitators and barriers, leading to an integrative profile of communication performance (IPCP) for each child. Whereas these six children shared a developmental, and/or expressive vocabulary age and/or level of communicative intent, the children faced similar but also unique personal and environmental factors that play an important role in their communication performance. Our data reveal that a combination of different factors may lead to the same language outcomes and vice versa, based on a unique pattern of interdependency of ICF-CY domains. Planning SLP interventions for enhancing communication performance in children with DS should therefore be based on a comprehensive view on the competences and limitations of every individual child and its significant communication partners. This evaluation should address facilitators and barriers in body functions, structures, activities, participation and environment, with a specific focus on individual strengths. The ICF-CY provides a useful framework for constructing an IPCP that serves this purpose.

Core vocabulary of young children with Down syndrome

Abstract The aim of this study was to develop a core vocabulary list for young children with intellectual disabilities between 2 and 7 years of age because data from this population are lacking in core vocabulary literature. Children with Down syndrome are considered one of the most valid reference groups for researching developmental patterns in children with intellectual disabilities; therefore, spontaneous language samples of 30 Dutch children with Down syndrome were collected during three different activities with multiple communication partners (free play with parents, lunch- or snack-time at home or at school, and speech therapy sessions). Of these children, 19 used multimodal communication, primarily manual signs and speech. Functional word use in both modalities was transcribed. The 50 most frequently used core words accounted for 67.2% of total word use; 16 words comprised core vocabulary, based on commonality. These data are consistent with similar studies related to the core vocabularies of preschoolers and toddlers with typical development, although the number of nouns present on the core vocabulary list was higher for the children in the present study. This finding can be explained by manual sign use of the children with Down syndrome and is reflective of their expressive vocabulary ages.

Predictors of receptive and expressive vocabulary development in children with Down syndrome

Abstract Purpose: There is a lack of longitudinal data on predictors of vocabulary development in children with Down syndrome (DS). In typically developing children, many internal and external predictors of vocabulary development have been determined before. The purpose of the present study was to investigate the role of these variables in the receptive and expressive vocabulary development of children with DS. Method: The present study used a longitudinal design in young children with DS to study the vocabulary development over a period of 1.6 years and investigated the possible predictive role of child-related and environmental variables. Result: Receptive vocabulary development was best predicted by the adaptive level of functioning and early receptive vocabulary skills. Expressive vocabulary development was best predicted by the adaptive level of functioning, receptive vocabulary, maternal educational level, level of communicative intent of the child, attention skills and phonological/phonemic awareness. Conclusion: A wide range of internal and external predictors for vocabulary development of children with DS was found. Predictors resemble those predicting vocabulary development in peers with typical development between 1 and 6 years of age, as identified in other studies.