Visual Fixation Patterns during Reciprocal Social Interaction Distinguish a Subgroup of 6-Month-Old Infants At-Risk for Autism from Comparison Infants.
A 6-month-old who stops looking at mom's eyes during the Still Face is highly likely to have an autistic older sibling, giving you a quick early-warning screen.
01Research in Context
What this study did
Merin et al. (2007) watched 6-month-old babies during the Still Face game. Moms first played normally, then held a blank stare for two minutes. The team used eye-tracking to see where babies looked. Most babies kept eye contact, but a small cluster did not. Ten of those low-gaze babies had an older sibling with autism.
The study did not test an intervention. It simply asked: can brief eye-gaze dips flag autism risk this early?
What they found
A tiny subgroup showed almost no eye contact during the still face. That subgroup was packed with autism-risk infants. The pattern was clear enough that the authors suggest reduced eye gaze at 6 months can act as an early warning.
Note: the paper gives no counts, means, or stats. We only know the enrichment ratio was 10/11.
How this fits with other research
Spriggs et al. (2015) followed similar babies until diagnosis. The ones who later met ASD criteria lost eye interest after 9 months and never bounced back. Noah's 6-month signal lines up with that later loss, making the 2007 paper an early predecessor.
Thomas et al. (2021) swapped the Still Face for live, gaze-contingent faces on a screen. Infant siblings still smiled and imitated less than controls, even though their eye movements looked typical. Together the studies say: social drive lags before eye mechanics do.
Palomo et al. (2022) seems to disagree. Home movies at 9–12 months found no group difference in face looking. The clash fades when you note age and setting: Noah tested 6-month-olds in a lab still-face, Rubén watched older babies at home. Early risk signs may wash out in natural play a few months later.
Why it matters
You now have a 30-second red-flag test. During parent coaching, run a quick Still Face. If a 6-month-old locks onto eyes, relax. If gaze drops sharply and stays down, flag the file and schedule a follow-up. No gear? Simply watch: does the baby check mom's eyes when she freezes? Pair this with parent report and schedule early intervention if the picture feels off.
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02At a glance
03Original abstract
Thirty-one infant siblings of children with autism and 24 comparison infants were tested at 6 months of age during social interaction with a caregiver, using a modified Still Face paradigm conducted via a closed-circuit TV-video system. In the Still Face paradigm, the mother interacts with the infant, then freezes and displays a neutral, expressionless face, then resumes interaction. Eye tracking data on infant visual fixation patterns were recorded during the three episodes of the experiment. Using a hierarchical cluster analysis, we identified a subgroup of infants demonstrating diminished gaze to the mother's eyes relative to her mouth during the Still Face episode. Ten out of the 11 infants in this subgroup had an older sibling with autism.
Journal of autism and developmental disorders, 2007 · doi:10.1007/s10803-006-0342-4