Visuo-spatial ability in individuals with Down syndrome: is it really a strength?
Stronger verbal working memory and attention link to bigger vocabularies in adults with Down syndrome.
01Research in Context
What this study did
Yang et al. (2014) tested 19 young adults with Down syndrome. They looked at how well the adults could stop, pay attention, and hold words in mind. Then they checked if those skills matched the adults' vocabulary scores.
What they found
Better verbal working memory and attention went hand-in-hand with bigger receptive and expressive vocabularies. In plain words, the adults who could hold more words in mind also knew and used more words.
How this fits with other research
Hawley et al. (2004) saw poor verbal memory in teens with Down syndrome and blamed the central executive, not the articulatory loop. Yingying’s adult data line up: executive skills matter for language.
Myers et al. (2018) pushed the link even earlier. In infants with Down syndrome, joint attention and general cognition predicted later language. Together the studies draw a timeline: early attention → childhood memory → adult vocabulary.
Jackson et al. (2025) adds a twist. They found that weak shifting and working memory in youth forecast higher anxiety a year later. So training executive skills might lift both language and mood.
Why it matters
If you work with teens or adults who have Down syndrome, screen verbal working memory and attention. Short executive-function drills could be a two-for-one: they may expand vocabulary and lower anxiety. Start small—use a three-word memory game before teaching new sight words.
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02At a glance
03Original abstract
BACKGROUND: This study examined the association between executive functioning and language in young adults with Down syndrome (DS). METHOD: Nineteen young adults with DS (aged 19-24 years) completed standardised measures of overall cognition, vocabulary, verbal fluency and executive function skills. RESULTS: Friedman's analysis of variance (χ2 (3) = 28.15, P < .001) and post hoc comparisons indicated that, on average, participants had a significantly lower overall non-verbal than verbal cognitive age equivalent and lower expressive than receptive vocabulary skills. Using Spearman correlations, performance on a verbal measure of cognition inhibition was significantly negatively related to receptive vocabulary (ρ = -.529, adjusted P = .036) and verbal fluency (ρ = -.608, adjusted P = .022). Attention was significantly positively correlated with receptive (ρ = .698, adjusted-p = .005) and expressive (ρ = .542, adjusted P = .027) vocabulary. Verbal working memory was significantly positively associated with receptive vocabulary (ρ = .585, adjusted P = .022) and verbal fluency (ρ = .737, adjusted P = .003). Finally, visuospatial working memory was significantly associated with receptive vocabulary (ρ = .562, adjusted P = .027). CONCLUSIONS: Verbal and non-verbal measures of executive functioning skills had important associations with language ability in young adults with DS. Future translational research is needed to investigate causal pathways underlying these relationships. Research should explore if interventions aimed at increasing executive functioning skills (e.g. attention, inhibition and working memory) have the potential to lead to increases in language for young adults with DS.
Research in developmental disabilities, 2014 · doi:10.1016/j.ridd.2014.04.002