An investigation of attention and affect in children with autism and Down syndrome.
Autistic preschoolers give fewer smiles and glances than language-matched Down-syndrome peers, and this gap lasts into adulthood.
01Research in Context
What this study did
The team watched preschoolers at home during everyday play.
They compared kids with autism to kids with Down syndrome who had similar language skills.
Observers counted how often each child smiled and looked at the caregiver’s face.
What they found
The autistic group showed fewer clear smiles and less eye contact.
The difference in looking at faces was small and not significant.
Still, the mood in the room felt flatter when autism was present.
How this fits with other research
Mace et al. (1990) saw the same flat affect seven years earlier.
They used mentally retarded and typical peers as controls, so the new Down-syndrome match sharpens the picture.
Tetreault et al. (2025) moved the lens forward two decades and found the muted-smile pattern still holds in young adults chatting with strangers.
Amaral et al. (2017) adds a twist: Down-syndrome kids who later screen positive for autism show milder social gaps than the clinical autism group, hinting that the two conditions may blur at the edges.
Why it matters
You now have a sturdy baseline: autistic preschoolers can talk at the same level as Down-syndrome peers yet still send fewer warm cues.
When you write goals, target both looking and smiling, not just one.
A quick tally of smiles during play can show parents clear change, even before words grow.
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02At a glance
03Original abstract
Longitudinal videotape recordings of six young children with autism and six age- and language-matched children with Down syndrome in structured play with their mothers at home were coded for the focus of the child's visual attention for four bimonthly visits and for facial affect for two of the four visits. The main finding was that the children with autism showed reduced expression of positive affect in a familiar social context. The autistic group attended to the mother's face and the researchers only about half as much as the Down syndrome group, but these differences did not reach statistical significance. Compared to the Down syndrome group, the autistic group displayed a smaller proportion of their total positive affect toward the mother's face and toward the researcher, but only the latter group difference reached statistical significance. Although limited by the small sample size, these findings suggest that autistic children's known deficits in attention and affective responsiveness to others persist even in structured interactions with a familiar partner in the home.
Journal of autism and developmental disorders, 1997 · doi:10.1023/a:1025853321118