Computer Vision Analysis of Reduced Interpersonal Affect Coordination in Youth With Autism Spectrum Disorder.
Casey J Zampella, Loisa Bennetto, John D Herrington
PMID 32666690WHAT IT FOUND
Youth with autism smiled less and coordinated their smiles less with conversation partners than typically developing peers.
This reduced coordination was associated with lower parent-rated social skills and empathy, suggesting a link between facial synchrony and daily social functioning.
Key findings
01Youth with ASD smiled significantly less than typically developing controls across interactions with both mothers and unfamiliar adults.
02Interpersonal smile coordination was lower in youth with ASD compared to controls, and this coordination was a significant predictor of adaptive social skills and empathy.
03The association between smile coordination and autism-specific social symptoms was not significant when controlling for diagnostic group, limiting its use as a standalone marker for ASD severity.
STILL TO COME
How it was doneWhat they foundWhat it means for OTsWhat it means for SLPs
Read the rest of this summary
You get three full summaries a month, free, and we do not ask for a card. Search, the TL;DRs and your library stay unlimited either way.
What it does not show
The sample size was small (20 with ASD, 16 controls), limiting the generalizability of the findings. Participants had average to above-average intellectual and language abilities, so results may not apply to those with more significant cognitive or language impairments. The study used a specific cooperative task to elicit positive affect, so findings may not extend to neutral or negative social contexts. Computer vision analysis cannot distinguish between voluntary and spontaneous smiling, nor can it assess the quality or appropriateness of the facial expression, only its intensity and timing. The association between smile coordination and autism-specific symptoms disappeared when controlling for diagnostic group, suggesting this link may be driven by the group difference rather than a continuous relationship within the ASD population.
Declared interests
The authors declared no conflicts of interest. The study was supported by grants from the National Institute of Mental Health and the National Institute of Child Health and Human Development.
The easy way to misread this
Do not interpret reduced smile coordination as a definitive diagnostic marker or a direct cause of social difficulties. The study is preliminary, the sample is small and high-functioning, and the link between coordination and autism-specific symptoms was not significant when controlling for group. It describes an association in a specific positive interaction task, not a proven mechanism or a generalizable assessment standard.