Longitudinal predictors of early language in infants with Down syndrome: A preliminary study.
Joint attention and general cognition, not speech segmentation, forecast later language in infants with Down syndrome.
01Research in Context
What this study did
Myers et al. (2018) followed 24 babies with Down syndrome for one year. They tested each baby at 11, 18, and 24 months.
The team measured three things: how well the child noticed when an adult pointed or looked at a toy (joint attention), the child’s overall thinking skills, and the ability to pick words out of speech. They wanted to see which skills best predicted later vocabulary.
What they found
General thinking scores and joint-attention skills at 11 months predicted vocabulary at 24 months. Word-segmentation skill did not.
In plain words: babies who could follow eye-gaze and solve simple puzzles talked more one year later. Picking single words from a sentence added no extra value.
How this fits with other research
Martínez-Castilla et al. (2024) later showed teens with Down syndrome still struggle to hear stress patterns in speech. Together the studies form a line: early joint attention matters first, then auditory stress cues remain hard through the teen years.
H-Fournier et al. (2004) found sentence memory, not speech speed, predicted language in older children. Emily’s infant data match this—both point to cognitive load, not fine auditory skill, as the lever.
de Campos et al. (2012) reviewed exploration in babies with risk conditions. Their scoping work says each diagnosis shows unique movement patterns. Emily’s focus on joint attention fits that call for diagnosis-specific targets.
Why it matters
Stop drilling word segmentation in one-year-olds with Down syndrome. Spend your minutes on joint-attention games and cognitive play. Use pointing, showing, and turn-taking routines. These build the base that later vocabulary rests on.
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02At a glance
03Original abstract
PURPOSE: Children with Down syndrome (DS) typically have marked delays in language development relative to their general cognitive development, with particular difficulties in expressive compared to receptive language. Although early social communication skills, including gestures and joint attention, have been shown to be related to later language outcomes in DS, knowledge is limited as to whether these factors exclusively predict outcomes, or whether other factors (e.g. perceptual and non-verbal skills) are involved. This study addressed this question. METHOD: Longitudinal data for a group of infants with DS (n = 14) and a group of typically-developing (TD) infants (n = 35) were collected on measures that have been shown to predict language in TD infants and/or those with developmental delays. These included: non-verbal mental ability, speech segmentation skills, and early social communication skills (initiating and responding to joint attention, initiating behavioural requests). RESULTS: Linear regression analyses showed that speech segmentation and initiating joint attention were the strongest predictors of later language in the TD group, whereas non-verbal mental ability and responding to joint attention were the strongest predictors of later language for infants with DS. CONCLUSIONS: Speech segmentation ability may not determine language outcomes in DS, and language acquisition may be more constrained by social communication and general cognitive skills.
Research in developmental disabilities, 2018 · doi:10.1016/j.ridd.2017.12.021