Infant precursors of executive function in Down syndrome.
Attention shifting at 12 months predicts later executive function in infants with Down syndrome—screen it early.
01Research in Context
What this study did
The team watched 40 babies with Down syndrome and 40 typical babies. Each baby was 12 months old.
They filmed how long the babies stared at toys and how well the babies planned simple actions. Six months later they tested the same kids on basic executive-function tasks like remembering rules and switching games.
What they found
The DS group stared at toys longer and showed weaker action plans than the typical group. Attention shifting at 12 months predicted executive-function scores six months later in both groups, but the link was strongest in DS.
In plain words: babies who could quickly look away from one toy to another became better rule-followers later.
How this fits with other research
Raspail et al. (2025) extends this idea to teens. They showed that poor inhibition in mild-ID teens leads to mis-reading social cues, matching the infant pattern where weak control shows up early.
Ramos-Cabo et al. (2021) also extends the finding. They found that teens with ID are extra-easily swayed by outside opinions, again pointing to weak inhibitory control as a life-span issue.
Yaniv et al. (2017) used a similar quasi-ex setup with adults who have Tourette syndrome. They spotlighted response inhibition as the core EF deficit, paralleling how K et al. spotlight attention shifting in DS infants.
Why it matters
You can screen DS babies at one year by checking how flexibly they shift attention between toys. A simple play-based probe now gives you a heads-up on later self-control issues. Add quick attention-switch games into your early-intervention plan and track progress every few months.
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02At a glance
03Original abstract
BACKGROUND: Although early features of infant cognition are predictive of executive function (EF) in typically developing (TD) children, there is little information regarding the developmental origins of EF in neurogenetic conditions, such as Down syndrome (DS). METHODS: The current study compared the performance of infants with and without DS on three dimensions that are hypothesised EF precursors: visual engagement, attention shifting and action planning. Additionally, the relationship between these EF precursors at Time 1 and EF performance at Time 2 (6 months later) was examined in the DS group. Participants were 36 infants with DS, M chronological age = 12.65 months, SD = 2.11; M developmental age = 8.84 months, SD = 2.22, and 36 TD infants, M chronological age = 8.62, SD = 3.06; M developmental age = 8.64 months, SD = 3.40. RESULTS: Infants with DS visually engaged with objects for longer durations and demonstrated challenges with action planning compared with TD infants at Time 1. Attention shifting at Time 1 significantly predicted EF performance at Time 2 in the DS group. CONCLUSIONS: This study provides evidence that an early atypical presentation of EF precursors is detectable during infancy in DS and is predictive of subsequent EF performance. These findings contribute to the identification of areas of early cognitive risk in DS and can inform future interventions in this population.
Journal of intellectual disability research : JIDR, 2022 · doi:10.1111/jir.12824