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Early development (5 to 48 months) in Williams syndrome. A study of 14 children
1Centre for Human Genetics, University Hospital of Leuven, Belgium.
Insights
Children with Williams syndrome (WS) show distinct developmental patterns early on. Even before age 4, expressive language is less delayed than receptive language and fine motor skills.
Area of Science:
- Developmental Pediatrics
- Genetics
- Neuroscience
Background:
- Williams syndrome (WS) is a genetic disorder associated with developmental delays.
- Understanding early developmental trajectories in WS is crucial for timely intervention.
- Existing research often focuses on older children, leaving early development less understood.
Purpose of the Study:
- To determine the age of achievement for major developmental milestones in children with WS.
- To investigate whether early development in WS is typically harmonious or shows early discrepancies.
- To establish developmental norms for infants and toddlers with WS.
Main Methods:
- Longitudinal analysis of data from 14 children with Williams syndrome over five years.
- Regular evaluations using the Bayley Scales of Infant Development between 5 and 48 months.
- Informal observation sessions and interviews with parents and professionals.
Main Results:
- Children with WS exhibit a characteristic developmental profile even before 4 years of age.
- Expressive language skills show a less pronounced delay compared to other domains.
- Significant delays are observed in language comprehension and fine motor skills.
Conclusions:
- The typical developmental profile in Williams syndrome is evident in early childhood.
- Early identification of specific skill delays (comprehension, fine motor) is possible.
- These findings aid in establishing tailored developmental support for young children with WS.
Abstract:
At what age do children with Williams syndrome (WS) achieve major developmental milestones? Is their early development harmonious or are some of the typical discrepancies described in older children already noticeable? To address these questions we analysed information gathered over a five year period on 14 children with WS. Each child was evaluated at least twice between the ages of 5 and 48 months, using the Bayley Scales of Infant Development and during more informal observation sessions. Parents and professionals were also interviewed. This analysis provided us with an outline for "developmental norms" for children with WS and allowed us to conclude that, even before the age of 4 years, children with WS display a typical profile in their abilities. Expressive language skills are less delayed in contrast to the important delay in language comprehension and fine motor skills.